2023 Harley-Davidson RH1250S TSBs

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: 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. 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: 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: This bulletin informs dealers of updates made to the charging system on 2024 Revolution Max powered vehicles. For 2024, the charging system has been updated to improve electrical output at idle and low Revolutions Per Minute (rpm). Maximum output has remained the same. The following components have been changed: Stator and Stator Screws: The stator has increased in thickness, adding more wire length and longer stator screws; Cooling Manifold: The cooling manifold needed to be machined deeper to accommodate the stator size change; Alternator Cover Screws: The screws were shortened to prevent breaking through the new cooling manifold; Rotor Assembly: The magnets were moved, re-centering them over the new stator windings. NOTE: Using any of these parts in a 2021-2023 Revolution Max motor can result in catastrophic engine failure. NOTE: All Parts Catalogs have been updated to show correct service part numbers.

PURPOSE: This bulletin informs dealers that an improved Variable Valve Timing (VVT) harness connector and terminals are going to be used on 2024 Revolution Max powered vehicles. The old connector and terminals used on 2021-2023 Revolution Max powered vehicles will no longer be supported. Various kits have been created to support dealers in the change over of these parts.

PURPOSE: Revision. Updated Trike stage kit information. 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.

PURPOSE: Revision. Updated Motorcycles Affected and Required Dealer Action. This bulletin informs dealers that Harley-Davidson has specific areas of interest while troubleshooting on the Revolution Max platform. These areas of interest should be used in conjunction with the Service Manual and Electric Diagnostic Manual while troubleshooting. This information should be used as an aid to current troubleshooting steps and not a replacement. Best practice is to first troubleshoot current Diagnostic Trouble Codes (DTCs), in order of priority if there are multiple.

PURPOSE: Revision. Updated Motorcycles Affected. This bulletin informs dealers that Harley-Davidson RevolutionMax clutches will be serviced by a clutch disc kit and not with individual plates. A new clutch disc service kit (Part No. 37000383) will be provided for making clutch repairs on all Revolution Max powered vehicles moving forward. The procedure of replacing individual discs is no longer recommended. If one steel or fiber plate requires replacement, a clutch disc kit will need to be installed. Online Service Manuals located in Service Information Portal (SIP) and future printed copies will reflect this information. See https://serviceinfo.harley-davidson.com for the latest electronic version of the service manual.

PURPOSE: This bulletin informs dealers that Harley-Davidson has identified a publication plan for technical support documents for model year 2023 motorcycles.

Purpose: Initial Release. To inform dealers that a new redesigned Fuel Pump Module is available for the Sportster S and Pan America vehicles. The new Fuel Pump Module (Part No. 61200062A) has a larger fuel filter with new media and a slightly different housing to allow for assembly. This new Fuel Pump Module is retrofittable to all older vehicles. The new Fuel Filter (Part No. 61200123) is available separately for service but will only fit the new Fuel Pump Module. DO NOT mix old and new parts. When making warranty repairs, use the new Fuel Pump module (Part No. 61200062A). Return all old inventory of (Part No. 61200062) per Table 4.

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: This bulletin informs the dealers that there is a new Instrument Module (IM) software (LM7_51456370_20240322) and (LM4_51456370_20240325). Refer to: Infotainment Support Resources page on Service Information Portal (SIP).

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 dealer technicians that there is a new menu item in Digital Technician II (DT II). DT II now has a stand alone Module Replace menu inside of Vehicle Setup. This will allow you to program the factory settings, for the connected vehicle, to the Electronic Control Module (ECM), Body Control Module (BCM) and Infotainment Control Unit (IFCU) (if equipped) in a single menu. Initial Release. 8/7/2024.

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: This bulletin informs dealers that the current software version for the Left Hand Control Module (LHCM) and Right Hand Control Module (RHCM) have Diagnostic Trouble Codes (DTCs) U04438F (reported by the LHCM) and U04318F (reported by the RHCM), that are being set-off intermittently, shortly after a starting event and then seen as historic DTCs but there are no actual faults or operational concerns with the vehicle. In these cases where these codes are being found as historic, no further troubleshooting or hardware replacement should take place to resolve these historic DTCs. This will be addressed in a future software release. NOTE: If DTCs U04438F or U04318F are found to be CURRENT, follow troubleshooting steps in the Electrical Diagnostic Manual (EDM). Current affected software levels: LHCM: 0.33.02 RHCM: 0.37.02.

Purpose: Revision. This bulletin informs dealers that Harley-Davidson has a new part available to allow replacement of the Cruise Control Switch on Revolution Max powered vehicles. Replacing the entire Left Hand Control Module (LHCM) is no longer required due to a broken cruise control switch. Revision: Updated Required Dealer Action, Add graphic.

Purpose: This bulletin informs dealers that Harley-Davidson has a new part available to allow replacement of the Cruise Control Switch on Revolution Max powered vehicles. Replacing the entire Left Hand Control Module (LHCM) is no longer required due to a broken cruise control switch.

PURPOSE: REVISION. This bulletin informs dealers that a BCM and Electronic Control Module (ECM) update is available on Digital Technician II (DT II). Revision: Updated Body Control Module (BCM) part numbers. Updated Part Numbers Affected.

PURPOSE: To provide dealers with a list of items to check for when troubleshooting an inoperative security FOB for Revolution Max applications.

PURPOSE: This bulletin informs dealers that a Body Control Module (BCM) and Electronic Control Module (ECM) update is available on Digital Technician II (DT II). The BCM update addresses potential nuisance Diagnostic Trouble Codes (DTCs) and ride mode faults, most commonly found after a low voltage crank event or cold temperature start attempt. The ECM calibration update is to address a crank, but no start condition that can occur after a stall, followed by Diagnostic Trouble Code (DTC) P0347. This condition can sometimes be corrected by turning the Ignition OFF and waiting 30 or more seconds before turning the Ignition ON again, allowing the starter button to operate as normal.

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: Initial Release. This bulletin informs dealers that all 2026 Revolution Max Powertains will come equipped with oil scavenge screens installed in the clutch and water pump cavities of the oil system. Oil scavenge screens prevent debris from entering the oil pump, potentially causing damage that would require additional inspection and repair to the bottom end of Revolution Max Powertrain.

PURPOSE: This bulletin informs dealers that the clutch cable free play specification has been updated on all Revolution Max vehicles. Original specification: Dimension: 0.0390.079 in (12 mm). Free play has now been changed to: Dimension: 0.0790.118 in (23 mm). All online electronic service manuals and future publications will reflect this information.

PURPOSE: This bulletin informs dealers that Harley-Davidson Revolution Max clutches will be serviced by a clutch disc kit and not with individual plates. A new clutch disc service kit (Part No. 37000383) will be provided for making clutch repairs on all Revolution Max powered vehicles moving forward. The procedure of replacing individual discs is no longer recommended. If one steel or fiber plate requires replacement, a clutch disc kit will need to be installed. Online Service Manuals located in Service Information Portal (SIP) and future printed copies will reflect this information. See https://serviceinfo.harley-davidson.com for the latest electronic version of the service manual.

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: [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.

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: 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: To inform dealers of a new procedure for checking oil levels on Revolution Max powered vehicles. The procedure has been updated to account for potential concerns of a low oil fill condition when set on the side stand. This condition could be caused by having varying degree lean angles of the vehicles in the Revolution Max family while utilizing the same dipstick. Compounding this is the difference in lean angle of vehicles that come equipped with Adaptive Ride Height (ARH) set in the locked position (high) and set to drop when coming to a stop (low). To remedy this potential concern, the final step in checking the oil level will now be performed with the oil at operating temperature in the upright position for consistency across vehicle family and suspension settings. The side stand markings on the dipstick will only be used for a quick reference. NOTE: Oil levels checked on the side stand may read high after servicing the oil level in the upright position hot. This is a normal condition.

PURPOSE: Revision. Added Pan America information, Required Dealer Action, and Credit Procedure. This bulletin informs dealers that Harley-Davidson has specific areas of interest while troubleshooting on the Revolution Max platform. These areas of interest should be used in conjunction with the Service Manual and Electric Diagnostic Manual while troubleshooting. This information should be used as an aid to current troubleshooting steps and not a replacement. Best practice is to first troubleshoot current Diagnostic Trouble Codes (DTCs), in order of priority if there are multiple.