2023 Harley-Davidson Flhxse TSBs

PURPOSE: Revision A. Purpose for Service Bulletin. This bulletin informs dealers about: The cause and effects of moisture in engine oil. Service Manual troubleshooting updates for Milwaukee-Eight engines with the transmission-mounted breather, that have symptoms of moisture in oil and the best practices to avoid creating such instances. New Job Time Code (JTC 3017 Diagnose Oil Carryover/Moisture) for service manual troubleshooting.

PURPOSE: Initial release. This bulletin informs dealers that Harley-Davidson has identified instances of premature engine failure due to abrasive particle wear, specifically from debris inside new aftermarket exhaust headers. Recent evaluations have identified that certain newly manufactured exhaust headers may contain residual hard particles that, if not removed prior to installation, can migrate through the engine system and cause accelerated component wear or severe mechanical damage.

PURPOSE: Initial Release. This bulletin informs dealers that due to a delay in the release of Skyline OS software version (260005054D), the installation of Parts and Accessories (P&A) audio speakers in the Fairing Lowers and Tour-Pak will require an amplifier update to software version (1610). Refer to: Infotainment Support Resources Digital Technician II (DT II) is required for proper configuration. See Figure 1

PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). Version 26.3.2. Release Date: Week of January 28, 2026. NOTE Software version (26.3.2) will need to be manually installed only if current software version of DT II is (26.0.2). Refer to bulletin M1713 for instructions. New Features: LiveWire. Changes: Revolution Max and all MY2026 vehicles. NOTE: Digital Technician II (DT II) supports additional Harley-Davidson motorcycle models and model years outside of those listed.

PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). New Software Update Version 26.1.5. Release Date: Week of December 15, 2025. NOTE: Software version (26.1.5) will need to be manually installed. Refer to bulletin M1713 for instructions. New Features, Changes: 2026 Revolution Max Vehicles (RH975, RH975S, RH1250S, RA1250S, RA1250ST), 2026 Police Body Control Module (BCM), and Tire Pressure Monitoring System (TPMS). NOTE: Digital Technician II (DT II) supports additional Harley-Davidson motorcycle models and model years outside of those listed.

PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). New Software Update Version 26.0.2. Release Date: Week of November 18, 2025. New Features, Changes. 2026 Vehicles, 2025 Softail and LiveWire S2DM/MH/AP EV3. NOTE: Digital Technician II (DT II) supports additional Harley-Davidson motorcycle models and model years outside of those listed.

PURPOSE: Revision B. Updated: Summary. The App has returned to the Apple App Store. This bulletin informs dealers that a recent software update to the Screamin' Eagle Pro Street Tuner application will require the use of a Personal Computer (PC) to complete a Bluetooth Communication Interface (BCI) firmware update.

PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). New Software Update Version 25.8.9 Release Date: Week of September 2, 2025. Changes: LiveWire 2024 S2MH: Removal of incorrect Electro Hydraulic Control Unit (EHCU) reflash support; EHCU Module (Part No. 41100123): Addressed issue where module became unrecoverable after failed reflash attempted. NOTE: Digital Technician II (DT II) supports additional Harley-Davidson motorcycle models and model years outside of those listed.

PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). New Software Update Version 25.6.4, Release Date: Week of August 19, 2025. Includes New Features and Changes for the Models & Model Years listed. NOTE: Digital Technician II (DT II) supports additional Harley-Davidson motorcycle models and model years outside of those listed.

PURPOSE: Initial release. This bulletin informs dealers that starting on August 1, 2025, the Milwaukee-Eight Center-Cooled Direct Ship Warranty engines will not come with the decorative camshaft cover or Variable Valve Timing (VVT) solenoid. This involves all: Non-VVT equipped Touring and Softail models VVT solenoid equipped CVO models. NOTE: On VVT models, the solenoid opening will be plugged to prevent contamination.

PURPOSE: Revision (A) * Updated: Summary, Update table. This bulletin informs of the availability of the SYN3 New Improved Formula, a dual weight SAE 15W50 / SAE 50 Motorcycle Oil. The new formula transitions into inventory as the old SYN3 20W50 product inventory is depleted. Availability varies by SKU and region. The original SYN3 20W50 will be obsoleted when the transition is complete.

PURPOSE: This bulletin informs of the availability of the SYN3 New Improved Formula, a dual weight SAE 15W50 / SAE 50 Motorcycle Oil. The new formula transitions into inventory as the old SYN3 20W50 product inventory is depleted. Availability varies by SKU and region. The original SYN3 20W50 will be obsoleted when the transition is complete.

PURPOSE: Revision A . To inform dealers on how to enable Subwoofers with Skyline OS. NOTE: Service bulletin M1666 must be completed prior in doing this procedure. Revision A: Update information for Skyline OS software; Updated: Purpose for Parts and Accessories Bulletin, Vehicles Affected, Key Messages, Markets Affected and Summary.

PURPOSE: To inform dealerships that previous 2023-2024 Center-Cooled Screamin' Eagle 131ci/135ci Stage IV kits and 135ci Crate Engines WILL NOT FIT 2025 Center-Cooled Touring vehicles due to cylinder head and knock sensor changes.

PURPOSE: To inform dealerships of a new Vehicle Identification Number (VIN) and Calibration search function for the Screamin' Eagle Pro Street Tuner (Bluetooth).

PURPOSE: This bulletin instructs technicians to properly route the voltage regulator wire harness when performing service work on or around the regulator. Attention needs to be given that proper harness routing is achieved during reassembly. Incorrect routing of the voltage regulator harness, could cause damage to the harness due to unintended chaffing against the engine case.

PURPOSE: This bulletin informs dealers that ignition coil mounting bracket bosses for all 2025 Center-Cooled cylinder heads have been standardized. The mounting bosses will be machined to -in. diameter for all production and replacement cylinder heads. Initial Release. 8/22/2024.

PURPOSE: To inform dealers on how to enable Subwoofers with Skyline OS software version 2237D. NOTE: Service bulletin M1635 must be completed prior in doing this procedure.

PURPOSE: To inform dealerships that Harley-Davidson has made updates to oil filters including new part numbers, packaging design, and bulk case quantity changes.

GLIDE (FLHXSE) AND ROAD GLIDE (FLTRXSE). PURPOSE: Revision. To inform dealerships about Screamin' Eagle calibration availability and tuning capabilities for the 2023 CVO Street Glide (FLHXSE) and Road Glide (FLTRXSE). Markets Affected: United States (excluding California), Canada, Mexico, Australia, New Zealand. Update: Screamin Eagle Tune and Adjustability, Updated: Refer to Key Messages and Refer to Summary. NOTE: Correction of Communication Date in portal transaction ID: 24MC11001307 due to new portal interface use.

GLIDE (FLHXSE) AND ROAD GLIDE (FLTRXSE). PURPOSE: Revision. To inform dealerships about Screamin' Eagle calibration availability and tuning capabilities for the 2023 CVO Street Glide (FLHXSE) and Road Glide (FLTRXSE). Markets Affected: United States (excluding California), Canada, Mexico, Australia, New Zealand. Update: Screamin Eagle Tune and Adjustability, Updated: Refer to Key Messages and Refer to Summary.

PURPOSE: This bulletin inform dealers that starting on April 30, 2024, all Center-Cooled touring vehicles will be assembled with new components, engineered to help improve a service bleed of the cooling system. Before March 12, 2024 all vehicles were built with the early system. From March 12, 2024 to April 30, 2024 vehicles were built with early and late system designs. After April 30, 2024 all vehicles were built with the late design. The components used in Early Models are listed in Table 2. The components used in Later Models are listed in Table 3. These parts will be listed separately in the parts catalog labeled as Early and Later models with an applicable date noted. Do not mix the components used in Early and Later Models. They are not interchangeable. Should Early Model components become unavailable in the future, see the Parts Catalog and Parts Price File for super session information.

PURPOSE: Revision. Parts availability update. * Updated: Refer to Purpose for Parts and Accessories Bulletin. To inform dealers that the Vehicle Hold Control (VHC) Upgrade Kit (Part No. 69203477) requires a Digital Technician II (DT II) update to enable the additional functionality from the kit. The DT II update (version 24.5.0) is now available to dealers. For any kits that were ordered before February 9th, 2024, instruct the customers to return for their update. The following part numbers are now available to order: 69203477-VHC Upgrade Kit, 50700116A-Long Haul Package (Chrome), 50700117A- Long Haul Package (Black). NOTE: Package part numbers 5070116A and 5070117A no longer include the Vehicle Hold Control kit.

PURPOSE: To inform dealerships about incorrect labels on Screamin' Eagle Stage II Kits (Part No's 92500132 and 92500133) from January 2024 launch. (Part No. 92500132) should have come with Black pushrod covers, instead they incorrectly shipped with Chrome. (Part No. 92500133) should have come with Chrome pushrod covers, instead they incorrectly shipped with Black.

PURPOSE: To inform dealerships of the proper usage of the M18 Oxygen Sensor Installation Tool (Part No. 14900150) and the required drill press operation.

PURPOSE: To inform dealers that the Vehicle Hold Control (VHC) Upgrade Kit (Part No. 69203477) both sold separately and found in the 2024 Long Haul Packages requires a Digital Technician II (DT II) update to enable the additional functionality from the kit, that is not yet released. The DT II update (version 24.5.0) will be available to dealers by the end of March 2024. For any kits that were ordered before February 9th, 2024, instruct the customers to return after the update is received. The following part numbers will be put on an ordering hold until issue is resolved: 69203477-VHC Upgrade Kit, 50700116-Long Haul Package (Chrome), 50700117- Long Haul Package (Black). NOTE: This only pertains to vehicle's equipped with Rider Safety Enhancements / Cornering Rider Safety Enhancements formerly known as Reflex Defensive Rider Systems (RDRS).

GLIDE (FLHXSE) AND ROAD GLIDE (FLTRXSE). PURPOSE: Revision. To inform dealerships about Screamin' Eagle calibration availability and tuning capabilities for the 2023 CVO Street Glide (FLHXSE) and Road Glide (FLTRXSE). Markets Affected: United States (excluding California), Canada, Mexico, Australia, New Zealand. Updated: Refer to Key Messages. and Refer to Summary Update: Screamin Eagle Tune and Adjustability.

PURPOSE: To inform California dealers about the new California Air Resources Board (CARB) approvals for select 2021-2022 Harley-Davidson vehicles. Summary: Various Screamin' Eagle Air Cleaner Kits and Stage I calibrations have been approved for sale on select 2021 and 2022 Harley-Davidson models. Please see the table that indicates which part numbers should be ordered for what models.

PURPOSE: To inform California dealers about the new California Air Resources Board (CARB) approvals. Screamin' Eagle Quickshifter and Screamin' Eagle Extreme Flow 55mm Intake Manifold.

PURPOSE: To inform dealers that there is an installation accessory for Chopped Tour-Paks on the 2023 CVO Street Glide (FLHXSE) and Road Glide (FLTRXSE) models. A new Tour-Pak Spacer Kit (Part No. 53001105) is required for this installation.

PURPOSE: To inform dealerships about Screamin' Eagle calibration availability and tuning capabilities for the 2023 CVO Street Glide (FLHXSE) and Road Glide (FLTRXSE). Markets Affected: United States (excluding California), Canada, Mexico, Australia, New Zealand.

PURPOSE: Revision I to L - Updated Document History. Updated Summary. Rev L thru J 7/27/2023 - Updated Summary: Screamin Eagle Stage kit calibration dates for various models. Rev H 5/26/2023 - Updated Summary: Updated: Jan 2, 2023 Softail calibration info. Added: July 2023 Softail calibration info for FXBR, FXLRS, FXLRST models. Rev I 5/26/2023 - Updated Summary: Updated: Trike Stage I and II July calibrations to "Now Available". To inform 49-State US, Canada, Mexico, and ANZ dealerships of the Screamin' Eagle calibration schedule as it relates to 2023 vehicles. Markets Affected: United States (excluding California), Canada, Mexico and New Zealand. Revision: Updated timing for 2023 DTII Screamin Eagle calibrations.

PURPOSE: This bulletin informs dealers how important is it to understand the Proper Check, Fill and Bleed Procedures for the 2023 CVO Street Glide (FLHXSE) and Road Glide (FLTRXSE) cooling system. When servicing the new cooling system on the Milwaukee-Eight 121 Variable Valve Timing (VVT) powered vehicle, it is important to understand how to check the coolant level, drain, fill and bleed the system. Failure to closely follow the vacuum bleed procedures, will result in an incomplete system purging, potentially causing engine overheating.

PURPOSE: This bulletin informs dealers of a software error preventing the transport mode icon from being displayed on the Infotainment Control Unit (IFCU) when transport mode is activated on 2023 CVO Street Glide (FLHXSE) and CVO Road Glide (FLTRXSE) motorcycles. This condition will be repaired in a later software update. The Owner's Manual states a transport mode icon will display on the IFCU when the vehicle is placed in transport mode. Due to a software error, the icon will not display at this time. The user can verify that the bike is in transport mode by observing the turn signals flashing three times when transport mode is engaged.

PURPOSE: Revision B. Purpose for Service Bulletin: NOTE The repair in the bulletin DOES NOT qualify for Emissions therefore EMS claims will not be accepted. This bulletin informs dealers that there is an Ignition Coil Harness Repair Kit (Part No. 69203885) available in the event that there is damage found to the wire harness branch that goes to the Ignition Coil. See Figure 1. If any of the four wires going to connector [83B] (V/GN, GY/BE, R/GN, GN/BE) are damaged, the Ignition Coil Harness Repair Kit (Part No. 69203885) should be used. See Installation-Sheet 94100741 on Service Information Portal (SIP). REV B: Updated: Purpose for Service Bulletin. Add Note for Emissions/EMS.

PURPOSE: Revision. Purpose for Service Bulletin: This bulletin informs dealers that there is an Ignition Coil Harness Repair Kit (Part No. 69203885) available in the event that there is damage found to the wire harness branch that goes to the Ignition Coil. See Figure 1. If any of the four wires going to connector [83B] (V/GN, GY/BE, R/GN, GN/BE) are damaged, the Ignition Coil Harness Repair Kit (Part No. 69203885) should be used. REV A: Updated: Required Dealer Action. Add Pre-delivery Note.

PURPOSE: Initial Release. This bulletin informs dealers and technicians that there are Parts and Accessories (P&A) Wiring Schematics for Harley-Davidson Audio Powered by Rockford Fosgate components. Schematics are available for both Non Center-Cooled and Center-Cooled models.

PURPOSE: Initial Release. This bulletin informs dealers that there is a Body Control Module (BCM) update available for 2023-2025 Center-Cooled Touring models that contains reconfigured turn signal auto cancellation software. This update is only required in cases where there is a customer request related to the duration of turn signal auto cancellation, as certain rider movement by select riders can influence the turn signal cancellation duration. This update will be available in Digital Technician II (DT II) software version (26.2.1) or later. This update is to provide updated software for extending the duration of turn signal auto cancellation. Updated Software Version: CALIBRATION: 16.5.43.2 SOFTWARE: 16.5.11.2.

PURPOSE: Initial Release. Purpose for Service Bulletin: This bulletin informs dealers that there is an Ignition Coil Harness Repair Kit (Part No. 69203885) available in the event that there is damage found to the wire harness branch that goes to the Ignition Coil. See Figure 1. If any of the four wires going to connector [83B] (V/GN, GY/BE, R/GN, GN/BE) are damaged, the Ignition Coil Harness Repair Kit (Part No. 69203885) should be used.

PURPORSE: Revision T. The purpose of this bulletin is to inform the dealer network that a software update to the GRX-3110 and DCA-8000 is now available. DYNAMIC DIAGNOSTIC CHARGER SYSTEM (PART NUMBER: DCA-8000). [Rev T] Updated: New Software Update, Previous Software Updates and DCA-8000. Added: 192-210335P. Software update 192-210335P for GRX-3110 and DCA-800 to add new battery part numbers.

PURPOSE: This bulletin informs dealers that in the event "VINERR" is displayed on the Infotainment Control Unit (IFCU), the IFCU will turn off the WiFi menu and Navigation. This is an as designed reaction to the "VINERR" message. In this condition functions such as WiFi, Wireless Apple CarPlay and embedded Navigation will not work. "VINERR" will be displayed in the odometer if the IFCU and Electronic Control Module (ECM) are not seeing the same Vehicle Identification Number (VIN) in both modules. This can occur during module replacement, module swapping during testing, module updates or the installation of an aftermarket module. Warranty claims for this concern may be denied based on the cause.

PURPOSE: This bulletin informs the dealership network that Harley-Davidson has provided guidelines for battery warranty. REV H. Update section headers: AGM and Lithium-Iron Phosphate Batteries. Add graphics and callouts. Updated: Information on Battery.

PURPOSE: [Revision G: Updated: Information on Battery. Update section headers: AGM and Lithium-Ion Batteries.] This bulletin informs the dealership network that Harley-Davidson has provided guidelines for battery warranty.

PURPOSE: [Revision F. Added: Added video link for the DCA-8000 Battery Tester. Added: Supplemental Procedure Video.] This bulletin informs the dealership network that Harley-Davidson has provided guidelines for battery warranty.

PURPOSE: Revision E. Added: Added procedures for the DCA-8000 E Battery Tester.* Updated: All sections. This bulletin informs the dealership network that Harley-Davidson has provided guidelines for battery warranty.

PURPOSE: This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). Version 24.8.8. Release Date: Week of August 5, 2024. New Features for Harley-Davidson vehicles: Advanced Module Replace for 2021 and later Revolution Max; 2023 and later CVO Touring; and 2024 Street Glide (FLHX), Road Glide (FLTRX). New Features for LiveWire vehicles: Updated calibrations for 2024 S2DM EV1/ EV6; 2024 S2MH EV1; and 2024 S2DM, S2MH. Changes: Added Hand Control Module (HCM) (Part No. 71500522A and 71500536A) for reflash support.

PURPOSE: Revision. Updated: Purpose for Service Bulletin, Vehicles Affected, Part Numbers and Credit Procedure. Removed 2024 Models (FLHX, FLTRX) as they are superseded by bulletin M1645. PURPOSE: To inform the dealer network that there is an Electronic Control Module (ECM) update available for 2023 CVO Street Glide (FLHXSE), CVO Road Glide (FLTRXSE) and 2024 CVO Street Glide (FLHXSE), CVO Road Glide (FLTRXSE) and CVO Road Glide ST (FLTRXSTSE). This update is to address a Crank, No Start concern that results in no Diagnostic Trouble Codes (DTCs) populating after the crank cycle is complete and requiring an Ignition cycle to correct. NOTE: 2024 Street Glide (FLHX) and Road Glide (FLTRX) models were included on this bulletin prior to May 2, 2024. Those models have been removed from this bulletin as the ECM software update for those models are now covered under Service Bulletin M1645 which will include the correction for this Crank, No Start condition as well as the information covered in M1645.

PURPOSE: To inform the dealer network that there is an Electronic Control Module (ECM) update available for 2023 CVO Street Glide (FLHXSE), CVO Road Glide (FLTRXSE) and 2024 Street Glide (FLHX), Road Glide (FLTRX), CVO Street Glide (FLHXSE), CVO Road Glide (FLTRXSE) and CVO Road Glide ST (FLTRXSTSE). This update is to address a Crank, No Start concern that results in no Diagnostic Trouble Codes (DTCs) populating after the crank cycle is complete and requiring an Ignition cycle to correct.

PURPOSE: This bulletin informs dealers that an Amplifier software update is available for the 2023 CVO Street Glide (FLHXSE) and Road Glide (FLTRXSE). The updated software file can be found using the Software Updates link on the Harley-Davidson website or going directly to the INFOTAINMENT SUPPORT RESOURCES page on Service Information Portal (SIP). This update addresses: Optimization of audio output to saddlebag speakers, Improvements to Amplifier protection in low voltage situations, Miscellaneous Bug Fixes and Improvements.

PURPOSE: This bulletin informs dealers that due to a variance in harness lengths, the harness may require an additional cable strap to secure it to the frame. Vehicles built prior to September 1, 2023 are affected.

Purpose: To inform dealers that there is a temporary change to the wire colors, from what is shown in the Electrical Diagnostic Manual (EDM), on the Right Hand Control Module (RHCM) and Left Hand Control Module (LHCM) wire harnesses due to a wire shortage at the supplier. Once supply has been replenished the wire colors will go back to matching the information provided in the EDM.

PURPOSE: This bulletin informs dealers of what to expect when using the Infotainment Control Unit (IFCU) Service Menu. Along with the instruction on how to convert Diagnostic Trouble Codes (DTCs) due to the temporary condition of them being presented in HEX format rather than SAE as is shown in the Electrical Diagnostic Manual (EDM). This will be corrected in a future software update for the IFCU.

PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). Version Version 26.8.3, Release Date: Week of July 24, 2026. NOTE: Software version (26.4.3) will need to be manually installed only if current software version of DT II is (26.0.2). After (26.4.3) is manually installed, automatic updates will bring DT II to the latest software version. Refer to bulletin M1713 for instructions. New Features - Harley-Davidson: 2023-2024 Touring: Updated Electronic Control Module (ECM) calibration offerings. LiveWire: S2DM/MH/AP: Calibration bundle 10.2.28: Telematic Control Unit (TCU) reflash updates. Change: Vehicle Setup: Body Control Module (BCM) Tire Pressure Monitoring System (TPMS) Replacement: Correct issue where tire size selections were not available. System Info Auxiliary Load Controller (ALC): Added Bike configuration field. Data Items Trike ECM: Improved display of Gear Position when in reverse. Amp Added support for (Part No. 76001619).

PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). Version 26.5.2 Release Date: Week of March 30, 2026. NOTE Software version (26.4.3) will need to be manually installed only if current software version of DT II is (26.0.2). After (26.4.3) is manually installed, automatic updates will bring DT II to the latest software version. Refer to bulletin M1713 for instructions. New Features. 2024: Pan America (RA1250), Pan America Special (RA1250S), CVO Pan America (RA1250SE) Updated Body Control Module (BCM) reflash calibration. 2024-2026: CVO Road Glide ST (FLTRXSTSE) Updated Electronic Control Module (ECM) reflash calibration. 2026: CVO Street Glide ST (FLHXSTSE) Updated ECM reflash calibration. Changes. 2026 Trike Update Reverse Lockout Reason to support new values, Vehicle setup: Gear Indicator Calibration improve operation. 2025-2026 Softail Update reflash for Softail Speedometer (SPDO) enable operation of auxiliary lamp telltale. LiveWire S2 Provide reflash support for Vehicle Supervisory Controller (VSC) hardware (Part No. 41001756RE).

PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). Version 26.4.3 Release Date: Week of February 25, 2026. NOTE: Software version (26.4.3) will need to be manually installed only if current software version of DT II is (26.0.2). Refer to bulletin M1713 for instructions. New Features: Support for 2026 LiveWire Vehicles, LiveWire S2 Vehicle Status: Display notification when vehicle has unconfigured Electro Hydraulic Control Unit (EHCU) module, Vehicle Setup: New operation to support Anti-lock Braking System (ABS) / EHCU Correction, Reflash: Enabled EHCU calibrations for vehicles previously ineligible for update, requiring ABS / EHCU Correction to be performed. 20212025 Pan America (RA1250), Pan America S (RA1250S), Pan America ST (RA1250ST), CVO Pan America (RA1250SE): Reflash Updated Electronic Control Module (ECM) software calibration to improve quick shifter performance. Changes: Infotainment Control Unit (IFCU) Customization Correct issue where speakers were improperly configured.

PURPOSE: Revision. This bulletin informs dealers that (Part No. 33900172) is obsolete. Dealers must purchase the updated bearing door when installing the new shift drum on 2017-2024 Milwaukee-Eight vehicles. Revision B. Updated: Required Dealer Action. Updated sentence for M8 Transmission built before Oct 4, 2023.

PURPOSE: This bulletin informs dealers that there is a Body Control Module (BCM) update available for: 2023: CVO Street Glide (FLHXSE), CVO Road Glide(FLTRXSE) 2024: Street Glide (FLHX), Road Glide (FLTRX), CVO Street Glide (FLHXSE), CVO Road Glide (FLTRXSE), CVO Road Glide ST (FLTRXSTSE) This update is to address a concern of Hard/No start while attempting to start a bike in gear while the clutch lever is pulled in. This update also addresses a Ride Mode fault after a quick ON/OFF/ON ignition cycle.

Purpose: Revision. Update: Notes for Table 3 and 4. * Updated: Part Numbers. This bulletin informs dealers that all: Twin Cam gear packs on CVO, Dyna, Police, Softail, Touring & Trike models and Milwaukee-Eight gear packs on CVO, Police, Softail, Touring & Trike models ordered after December 04, 2023 will not come with the shift drum, forks, shafts and related hardware. Models Affected: 2006-2017 Twin Cams: Dyna models 2007-2016 Twin Cams: CVO, Police, Touring and Trike models 2007-2017 Twin Cams: Softail models 2017-2024 Milwaukee-Eight: CVO, Police, Touring and Trike models 2018-2024 Milwaukee-Eight: Softail models

Purpose: This bulletin informs dealers that all: Twin Cam gear packs on CVO, Dyna, Police, Softail, Touring & Trike models and Milwaukee-Eight gear packs on CVO, Police, Softail, Touring & Trike models ordered after December 04, 2023 will not come with the shift drum, forks, shafts and related hardware. Note: Resubmission is a correction to Selected Products Section of Transaction ID 24MC44619, NHTSA ID 10248397. Models Affected by M1612 to include only: 2006-2017 Twin Cams: Dyna models 2007-2016 Twin Cams: CVO, Police, Touring and Trike models 2007-2017 Twin Cams: Softail models 2017-2024 Milwaukee-Eight: CVO, Police, Touring and Trike models 2018-2024 Milwaukee-Eight: Softail models

Purpose: This bulletin informs dealers that all: Twin Cam gear packs on CVO, Dyna, Police, Softail, Touring & Trike models and Milwaukee-Eight gear packs on CVO, Police, Softail, Touring & Trike models ordered after December 04, 2023 will not come with the shift drum, forks, shafts and related hardware.

PURPOSE: This bulletin informs dealers that Harley-Davidson has observed on the 2023 CVO Street Glide (FLHXSE), poor retention of the brake and clutch line clip, located on the right side of the steering head. If poor retention of the brake and clutch line clip is observed, a Cable Strap (Part No. 10039) may be used to retain the clip in its intended location.

PURPOSE: This bulletin informs dealers of a transmission shift drum running change to all variants of the Milwaukee-Eight powertrain. Starting on October 4, 2023 all Milwaukee-Eight CVO, Police, Softail, Touring and Trike models will be assembled using a common shift drum. The new shift drum (Part No. 33900265) is replacing the old shift drum (Part No. 33900172). The new shift drum was developed to include the "D" shaft on the end to interface with the Gear Position Sensor on 2023 CVO Street Glide (FLHXSE) and Road Glide (FLTRXSE). For all other Milwaukee-Eight models, the bearing door has been modified by adding a pocket to accept the "D" shaft of the new shift drum.

PURPOSE: Revision. NOTE: Service Bulletin M1715 supersedes M1666. Repairs made to vehicles after April 8, 2026 following M1666 will not be accepted through warranty. Warranty claims on repairs made prior to April 8, 2026 will be accepted following standard claim submission policy and process. This bulletin informs dealers of a Skyline OS software update, version (260005057D), for 2023-2026 Touring and 2026 Trike vehicles equipped with an Infotainment Control Unit (IFCU). This software update will be available both as Over The Air (OTA) and Universal Serial Bus (USB). Revision C. Updated: Required Dealer Action. Updated: Pre-delivery Update Note Added.

PURPOSE: Revision. Updated: Purpose for Service Bulletin. Date Change: April 8 was April 24. Note added. NOTE: Service Bulletin M1715 supersedes M1666. Repairs made to vehicles after April 8, 2026 following M1666 will not be accepted through warranty. Warranty claims on repairs made prior to April 8, 2026 will be accepted following standard claim submission policy and process. This bulletin informs dealers of a Skyline OS software update, version (260005057D), for 2023-2026 Touring and 2026 Trike vehicles equipped with an Infotainment Control Unit (IFCU). This software update will be available both as Over The Air (OTA) and Universal Serial Bus (USB).

PURPOSE: Initial release 3/9/2026. Revision A. 3/24/2026. Updated: Purpose for Service Bulletin. Added supersession note regarding M1666. Purpose for Service Bulletin. NOTE Service Bulletin M1715 supersedes M1666. Repairs made to vehicles after April 24, 2026 following M1666 will not be accepted through warranty. Warranty claims on repairs made prior to April 24, 2026 will be accepted following standard claim submission policy and process. This bulletin informs dealers of a Skyline OS software update, version (260005057D), for 2023-2026 Touring and 2026 Trike vehicles equipped with an Infotainment Control Unit (IFCU). This software update will be available both as Over The Air (OTA) and Universal Serial Bus (USB).

PURPOSE: Initial Release. This bulletin informs dealers that when the Infotainment Control Unit (IFCU) is set to certain languages, any changes made to a custom ride mode will not save. This concern is found in 6 of the languages offered on the IFCU: Danish, Dutch, French (France), German, Japanese, Russian. Using any of the other 27 languages offered will allow changes to custom ride modes to be saved.

PURPOSE: Revision C. Added: Notes confirming latest software version before and after update. No warranty coverage for reinstallation of software or updating Parts and Accessories (P&A) amp. Updated: Purpose for Service Bulletin, Part Numbers and Required Dealer Action. This bulletin informs dealers that there is a Skyline OS software update for the 2023 and 2024 Touring vehicles equipped with an IFCU. This software update (240002237D) will bring 2023 and 2024 IFCU equipped vehicles to the same software version. The software update will also address a series of bugs within 2023 vehicles equipped with the Skyline OS. This update should be applied to all current software versions: 240001467D, 240002100D and 240002111D. This is a multi-step software update that also contains the latest Amplifier software (1.3.8.0).

PURPOSE: Revision. Updated: Vehicles Affected. Fixed date typo: March 23, 2024 was March 3, 2024. Service Bulletin M1635 supersedes M1625. Repairs made to vehicles after March 7, 2024 following M1625 will not be accepted through warranty. Warranty claims on repairs made prior to March 7, 2024 will be accepted following standard claim submission policy and process. This bulletin informs dealers that there is a Skyline OS software update for the 2023 and 2024 Touring vehicles equipped with an Infotainment Control Unit (IFCU). This software update (240002237D) will bring 2023 and 2024 IFCU equipped vehicles to the same software version. The software update will also address a series of bugs within 2023 vehicles equipped with the Skyline OS. This update should be applied to all current software versions: 240001467D, 240002100D and 240002111D. This is a multi-step software update that also contains the latest Amplifier software (1.3.8.0)

PURPOSE: Revision. Updated various sections. Updated: Vehicles Affected, Required Dealer Action and Troubleshooting. NOTE Service Bulletin M1635 supersedes M1625. Repairs made to vehicles after March 7, 2024 following M1625 will not be accepted through warranty. Warranty claims on repairs made prior to March 7, 2024 will be accepted following standard claim submission policy and process. This bulletin informs dealers that there is a Skyline OS software update for the 2023 and 2024 Touring vehicles equipped with an Infotainment Control Unit (IFCU). This software update (240002237D) will bring 2023 and 2024 IFCU equipped vehicles to the same software version. The software update will also address a series of bugs within 2023 vehicles equipped with the Skyline OS. This update should be applied to all current software versions: 240001467D, 240002100D and 240002111D. This is a multi-step software update that also contains the latest Amplifier software (1.3.8.0).

PURPOSE: NOTE Service Bulletin M1635 supersedes M1625. Repairs made to vehicles after March 7, 2024 following M1625 will not be accepted through warranty. Warranty claims on repairs made prior to March 7, 2024 will be accepted following standard claim submission policy and process. This bulletin informs dealers that there is a Skyline OS software update for the 2023 and 2024 Touring vehicles equipped with an Infotainment Control Unit (IFCU). This software update (240002237D) will bring 2023 and 2024 IFCU equipped vehicles to the same software version. The software update will also address a series of bugs within 2023 vehicles equipped with the Skyline OS. This update should be applied to all current software versions: 240001467D, 240002100D and 240002111D. This is a multi-step software update that also contains the latest Amplifier software (1.3.8.0).

PURPOSE: This bulletin informs dealers that there is a software update available for the 50S and the 30K headsets. This update is to improve the interaction of the headsets with the Infotainment Control Unit (IFCU) on the 2023 FLHXSE and FLTRXSE.

PURPOSE: This bulletin informs dealers that there is an available software update for the 2023 CVO Street Glide (FLHXSE) and Road Glide (FLTRXSE) audio amplifier. This update is to address a condition that would cause the Automatic Volume Control (AVC) not to function normally.

Purpose: Initial release. This bulletin informs dealers that a running change has occurred that impacts the design and assembly of the Touring license plate light cover. See Figure 1.

PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). Version 26.7.3. Release Date: Week of June 11, 2026. NOTE Software version (26.4.3) will need to be manually installed only if current software version of DT II is (26.0.2). After (26.4.3) is manually installed, automatic updates will bring DT II to the latest software version. Refer to bulletin M1713 for instructions.

PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). Version 26.6.2. Release Date: Week of April 22, 2026. NOTE: Software version (26.4.3) will need to be manually installed only if current software version of DT II is (26.0.2). After (26.4.3) is manually installed, automatic updates will bring DT II to the latest software version. Refer to bulletin M1713 for instructions. New Features: 2026 Police Vehicle Setup: Civilianize; LiveWire S2: Del Mar (S2DM), Mulholland (S2MH), Alpinista (S2AP) - Calibration bundle 10.2.20: Vehicle Supervisory Controller (VSC) and Onboard Charger (OBC) reflash updates. Changes: 2026 Trike Update Reverse Lockout Reason resize column.

PURPOSE: Revision C. This bulletin informs dealers that an issue was discovered in the Digital Technician II (DT II) software version (26.0.2), released on November 18, 2025. The issue prevents automatic software updates to be installed on your DT II computer. A manual installation of the latest DT II software version (26.4.3) will need to be performed if current DT II software version is (26.0.2), to allow future automatic updates. If a manual update to (26.1.5) or (26.3.2) has previously been completed, DT II will automatically update to (26.4.3) and no additional action is needed.. Revision C. Updated: Purpose for Service Bulletin and Required Dealer Action. Updated to Software Version (26.4.3).

PURPOSE: Revision B. This bulletin informs dealers that an issue was discovered in the Digital Technician II (DT II) software version (26.0.2), released on November 18, 2025. The issue prevents automatic software updates to be installed on your DT II computer. A manual installation of the latest DT II software version (26.3.2) will need to be performed if current DT II software version is (26.0.2), to allow future automatic updates. If a manual update to (26.1.5) or (26.2.1) has previously been completed, DT II will automatically update to (26.3.2) and no additional action is needed. Revision B. 1/28/2026. Updated: Purpose for Service Bulletin and Required Dealer Action. Updated to Software Version (26.3.2). Revision A. 1/16/2026. Updated: Purpose for Service Bulletin and Required Dealer Action. Updated to Software Version (26.2.1).

PURPOSE: Initial Release. This bulletin informs dealers that an issue was discovered in the Digital Technician II (DT II) software version (26.0.2), released on November 18, 2025. The issue prevents automatic software updates to be installed on your DT II computer. A manual installation of the latest DT II software version (26.1.5) will need to be performed, to allow future automatic updates.

PURPOSE: This bulletin informs dealers of a new naming convention for the cooling system on the redesigned 2023 and 2024 Harley-Davidson Touring models. Harley-Davidson is communicating that there is a new naming convention for the 2023 CVO Street Glide (FLHXSE), CVO Road Glide (FLTRXSE) and 2024 Street Glide (FLHX), Road Glide (FLTRX), CVO Street Glide (FLHXSE), CVO Road Glide (FLTRXSE) and CVO Road Glide ST (FLTRXSTSE) cooling system design. This cooling system will be referred to as Center-Cooled, based on the radiator mounting location. All communications moving forward, will identify this cooling system and use the naming convention of Center-Cooled. This will aid the dealer network in quick identification as we have for the other cooling systems.

PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). Version 24.6.4. Release Date: Week of May 1, 2024. New Features for LiveWire S2DM and S2MH, 2024 Revolution Max, and 2024 Touring.

PURPOSE: Revison. This bulletin informs dealers about the Harley-Davidson Initial Care program for the 2023 CVO Street Glide (FLHXSE) and Road Glide (FLTRXSE) vehicles. Updated: Required Dealer Action. Extended Initial Care until December 31, 2023. Updated key fob part numbers.

PURPOSE: This bulletin informs dealers that there is a running change for the oil pan fastener on all Milwaukee-Eight powered Softail and Touring models. As of Monday July 31, 2023, Powertrain Operations (PTO) in Menomonee Falls, WI is building all Milwaukee-Eight Softail and Touring powertrain models with new oil pan fasteners (Part No. 12600369). The old fasteners (Part No. 4741A) will still remain available for dealer purchase. The oil pans for the Softail and Touring models were updated to accept the new fastener geometry. Their Part Numbers have been superseded to (-A). Touring will be (Part No. 24400180A) and Softail will be (Part No. 24400208A). The new fastener will not fit with an old oil pan but the old hardware will still be available for dealer purchase. The old fastener CAN be used with a new (-A) oil pans. The fastener torque has not been changed.

PURPOSE: Revision. Updated Required Dealer Action, Reword tool requirements. This bulletin informs dealers that for the new 2023 CVO Road Glide and CVO Street Glide a tool for bleeding the coolant systems is no longer just recommended, but required to complete the bleed properly. This service cannot be performed properly without this tool.

PURPOSE: Initial Release. This bulletin informs dealers of the availability of new batteries for new Original Equipment (OE) vehicle production and in the Parts and Accessories (P&A) catalog. Availability of the new Absorbed Glass Mat (AGM) batteries will vary by market and will be transitioning over the next few months. NOTE: The ring terminal screws are not compatible between Leoch and East Penn batteries. The new batteries will include new ring terminal screws, which must be used. The ring terminal screws from the old battery need to be discarded.

PURPOSE: Initial Release. This bulletin inform dealers that there is an Electro Hydraulic Control Unit (EHCU) update available. This update is to improve functionality of the Linked Braking System. Linked Braking allows for more balanced front and rear braking under a wide variety of brake applications. At speeds greater than 20 mph (32 km/h), the system dynamically adjusts the linking to achieve better braking balance, as compared to single input braking. The EHCU update improves Linked Braking with optimized front and rear brake proportioning while only the rear brake is being applied by the rider. This software update is to address a possible customer concern related to the smoothness of brake engagement during a linked braking event when only rear brake is applied. If a customer has concerns on this Linked Braking operation under these conditions, this improvement update can be applied. NOTE: For vehicles within factory warranty and concern is present, submit a warranty claim per Table 4.

PURPOSE: This bulletin informs dealers that Harley-Davidson has identified an incorrect torque specification in the 2023 CVO Service Manual. Chapter 3, Front Wheel section, Front Brake Disk Screw torque update: Incorrect Torque: 1516 ft-lbs (19.922.1 Nm) Correct Torque: 2022 ft-lbs (2730 Nm).

PURPOSE: This bulletin informs dealers about the Harley-Davidson Initial Care program for the 2023 CVO Street Glide (FLHXSE) and Road Glide (FLTRXSE) vehicles.

Purpose: This bulletin informs dealers about the Harley-Davidson Essential Tools program for the 2023 CVO Street Glide (FLHXSE) and Road Glide (FLTRXSE) vehicles.

PURPOSE: This bulletin informs dealers that for the new 2023 CVO Road Glide and CVO Street Glide a tool for bleeding the coolant systems is no longer just recommended, but required to complete the bleed properly. This service cannot be performed properly without this tool.

PURPOSE: [Revision C. Updated: Tire Tread Depth Guide. Add tire part numbers 43100063, 43200035,43100029A, 43100033A and 43200045A.] To provide tire tread depth specifications for the dealership network to consult when filling warranty claims on used tires. Please see the Warranty Manual of your region for tire policy guidelines.

PURPOSE: [Revision B. Updated: Tire Tread Depth Guide. Add tire part numbers 43200063 and 43200038A.] To provide tire tread depth specifications for the dealership network to consult when filling warranty claims on used tires. Please see the Warranty Manual of your region for tire policy guidelines. Updated: Tire Tread Guide. Add tire part number 43100038B. Update tire tread depth, adjustment and reimbursement.

PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). New Software Update. NOTE: The TECHLINK 3 (PART NUMBER: HD-48650-TL3) supports Controller Area Network (CAN) and J-1850 protocol vehicles. 6-pin CAN vehicles are recommended to use Techlink 3 (TL-3) All 2021 (and later) vehicles must use TL-3 (connects to Red DLC on the vehicle) 4-pin (J-1850) vehicles are recommended to use TL-3. This includes all Fuel Injected Harley-Davidson vehicles 2002 and later. TECHLINK 3 (PART NUMBER: HD-48650-TL3) will not support Buell, VDO and Magneti Marelli vehicles (4-pin DLC). Support for those vehicles is available via TECHLINK II (PART NUMBER: HD-48650-1). Version 26.9.4, Release Date: Week of September 17, 2026. New Features, Changes. NOTE: Software version (26.4.3) will need to be manually installed only if current software version of DT II is (26.0.2). After (26.4.3) is manually installed, automatic updates will bring DT II to the latest software version. Refer to bulletin M1713 for instructions.

PURPORSE: Revision U. The purpose of this bulletin is to inform the dealer network that a software update to the GRX-3110 and DCA-8000 is now available. DYNAMIC DIAGNOSTIC CHARGER SYSTEM (PART NUMBER: DCA-8000). [Rev U] Added: Description of improvements made to the testing algorithm for GRX software Version P and DCA-8000 software Version E.

PURPOSE: Harley-Davidson has chosen to offer a revised calibration and installation of a steering ballast for certain 2023-2024 FLHXSE CVO Street Glide vehicles. Harley-Davidson is conducting a Product Program (0928) to offer this calibration upgrade and steering ballast installation at no charge to owners of the affected vehicles.

PURPOSE: This bulletin informs dealers that the 2023 CVO Street Glide (FLHXSE) and Road Glide (FLTRXSE) windshields could exhibit a visible knit line by the four mounting holes. The new CVO windshields are injection molded which enables a more intricate geometry required for the new design. Knit lines are inherent to the injection molding process when holes, slots, etc. are molded into the part. During the molding process, molten material flows around the core pin and knits together causing a fine line to appear. Knit lines are unavoidable and not considered a defect or warrantable concern. They are not a crack or a scratch in the material and the windshield will function as intended. Side air deflectors are also injection molded components and can exhibit knit lines around the mounting fasteners. Other Harley-Davidson windshields used a different manufacturing process that did not produce knit lines but also limited the shape of the windshields.