Vehicle report
Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
M1733
SERVICE BULLETIN M1733: COSMETIC CYLINDER STAINING (ALL MILWAUKEE-EIGHT MODELS). PURPOSE: Initial release. This bulletin informs dealers that cosmetic staining or etching on the inside of the cylinder bore does not have an impact on engine performance, oil consumption, or overall functionality. This bulletin provides example images of cylinders with cosmetic staining, and images of cases where cylinder replacement would be recommended.
M1490
SERVICE BULLETIN M1490 (V 26.8.3): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. 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).
M1679
SERVICE BULLETIN M1679: AFTERMARKET EXHAUST HEADER DEBRIS. 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.
M1713
SERVICE BULLETIN M1713 (REV C): DTII UPDATE PROCEDURE FOR SOFTWARE VERSION (26.4.3). 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).
W146
WARRANTY BULLETIN W146 (REV C): TIRE TREAD DEPTH GUIDE-UPDATE. 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.
M1391A
SERVICE BULLETIN M1391A (REVU): MIDTRONICS GRX-3110 AND DCA-8000 SOFTWARE. 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.
PAB1171
GENUINE MOTOR PARTS AND ACCESSORIES BULLETIN PAB1171 (REV B): SOFTWARE UPDATE FOR SCREAMIN EAGLE PRO STREET TUNER. 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.
M1684
SERVICE BULLETIN M1684: MARKET SPECIFIC BATTERY INTRODUCTION. 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.
M1611
SERVICE BULLETIN M1611 (REV B): MILWAUKEE-EIGHT TRANSMISSION SHIFT DRUM UPDATE. 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.
M1555
SERVICE BULLETIN M1555 (REV H): BATTERY WARRANTY GUIDELINES. 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.
PAB1165
GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1165 (REV A): H-D SYN3 SAE 15W50 / SAE 50 AVAILABILITY. 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.
M1650
SERVICE BULLETIN M1650: MILWAUKEE EIGHT AND TWIN CAM CAMSHAFT DRIVE GEAR RETENTION KIT CHANGES. PURPOSE: This bulletin informs dealers that changes have been made to the Camshaft Drive Gear Retention Kit and service proceduresfor the Milwaukee-Eight and Twin Cam applications. In an effort to increase the clamp load of the camshaft drive sprocket bolted joint and prevent the drive bolt from loosening in high lift camshaft applications, the following changes have been made: a. The camshaft drive bolt final torque has been increased to 40 ft-lbs (54 N·m) for all Milwaukee-Eight and certain Twin Cams models. See Vehicles Affected. This increase in torque will make the bolt a one time use application. Never re-use a camshaft drive bolt for service after tightening to the increased specification. See service manual for updated procedure. b. A new camshaft drive gear retention kit (Part No. 91800088) has been created. This new kit is compatible with all Milwaukee-Eight and Twin Cam engines using Parts and Accessories (P&A) camshaft and Original Equipment (OE) camshaft applications. See Instruction sheet for specific fitment on Twin Cam OE camshaft applications. The new kit utilizes friction washers to prevent unwanted rotation of components in the drive sprocket bolted joint under stress. The use of liquid threadlocker on the threads of the bolt and pre-lube to the head of the bolt flange and outside of the washer help the bolt reach full stretch when tightening. NOTE: Engines produced at all Harley-Davidson Motor Company (HDMC) plants will not come with the new kits installed. They will continue to be produced with (Part No. 25566-06).
PAB1158
GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1158: OIL FILTER PACKAGING AND CASE QUANTITY UPDATE. PURPOSE: To inform dealerships that Harley-Davidson has made updates to oil filters including new part numbers, packaging design, and bulk case quantity changes.
M1612
SERVICE BULLETIN M1612 (REV A): MILWAUKEE-EIGHT AND TWIN CAM TRANSMISSION GEAR PACKS. 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
PAB1144
GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1144: 2021-2022 SCREAMIN' EAGLE STAGE I (CARB) EO APPROVALS. PURPOSE: Revision. 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 below that indicates which part numbers should be ordered for what models. Revision: Refer to Summary. Update non-Bluetooth calibrations availability.
PAB1143
GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1143: SCREAMIN EAGLE CARB APPROVALS. 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.
PAB1142
GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1142 (REV A): SCREAMIN EAGLE X OHLINS SPECIALTY TOOLS FOR SOFTAIL FORK KIT(S). PURPOSE: To inform dealerships about the Ãhlins® specialty tools that are required for the installation of the Front Fork Kit(s) on 2018-later Softail models.
M1600
SERVICE BULLETIN M1600: 2023 MILWAUKEE EIGHT OIL PAN FASTENER CHANGE. 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.
M1586
SERVICE BULLETIN M1586: SCREAMIN' EAGLE OIL PUMP INCORRECTLY MACHINED. PURPOSE: This bulletin informs dealers that Harley-Davidson has found a quality issue with the Screamin' Eagle Oil Pump and how to check inventory for this condition. Markets Affected: Worldwide
M1507
SERVICE BULLETIN M1507: LOW/NO CHARGING DIAGNOSTICS. Revision. PURPOSE: To inform the dealers of updated and new symptom-based diagnostics for the low or no charging symptom. Motorcycles Affected: 2017-2023 Touring and Trike platform; 2018-2023 Softail platform. Required Dealer Action: Use the new diagnostics on all affected platforms. View current electronic version of the Electrical Diagnostic Manual (EDM) at https://serviceinfo.harley-davidson.com.
M1535
SERVICE BULLETIN M1535: SERVICE MANUAL AND ISHEET HANDLEBAR INSTALLATION REQUIREMENTS UPDATE: MODULAR BRAKE LINE KITS. PURPOSE: This bulletin informs dealers that Harley-Davidson has identified incorrect information in the 2018-2021 Softail Service Manuals. These errors have been corrected and are visible on Service Information Portal (SIP).
M1514
SERVICE BULLETIN M1514: 2020 SOFTAIL - CLUTCH RAMP RUNNING CHANGE. PURPOSE: Revision. To inform dealers of a running change to the inner and outer ramp of the clutch actuation system in all 2020 Softails built on and after March 15, 2020. Changing to the new inner and outer ramp from the previous design is not a warrantable event. Motorcycles Affected: 2018-2020 Softail - Built before March 15, 2020. Harley-Davidson is creating a kit (Part No. 37000376) for this change.
M1450
SERVICE BULLETIN M1450: MILWAUKEE-EIGHT EQUIPPED VEHICLES - LOSS OF POWER OR HIGH ENGINE BRAKING. PURPOSE: Revision. 2017 - 2019 model motorcycles equipped with a Milwaukee-Eight⢠engine can experience a condition known as sumping during extended periods at high rpm or under heavy engine load. This bulletin provides the diagnostic procedure for determining if sumping is occurring.
PAB1105
GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1105: SCREAMIN' EAGLE CALIBRATIONS & SMART TUNE UPDATES. PURPOSE: To inform dealers, that new Screaminâ Eagle® calibrations are now available for 49 State application. These calibrations are for the launched Touring (119/122 ci) Stage III Kits and Softail® (128/131ci) Stage IV Kits/Crate. Smart Tune software program enhancements within latest software release. Screamin' Eagle Smart Tune software program has been enhanced to allow for more advanced data acquisition over a broader range.
PAB1103
GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1103: SCREAMIN' EAGLE - NEW STAGE KIT CALIBRATION AVAILABILITY. PURPOSE: Revision. To inform dealers of Screaminâ Eagle® calibrations delayed availability. This delay covers the new Touring (119/122 ci) Stage III Kits and Softail® (128/131 ci) Stage IV Kits/Crate. The Screaminâ Eagle team expects to have all necessary 49-State calibrations by September 14, 2020.
PAB1093
GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1093: NEW 2020.5 SCREAMIN' EAGLE PRODUCT UPDATES. PURPOSE: Revision. To inform dealers of additional Screaminâ Eagle® 128/131 Stage IV Kit and 131 Crate Engine information.
PAB1104
GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1104: HIGH-FLOW EXHAUST SYSTEM â FITMENT UPDATE. PURPOSE: To inform dealers of Screaminâ Eagle® Touring High-Flow Exhaust System is now a 49-State compliant fitment for the 128/131 ci Stage IV Kit and 131ci Crate Engine. This exhaust system was designed in parallel with the 131 ci Crate engine for optimal performance while maintaining legal on-road use.
M1517
SERVICE BULLETIN M1517: MILWAUKEE-EIGHT ENGINE - CRANKSHAFT POSITION SENSOR. PURPOSE: To notify dealers of a Crankshaft Position (CKP) Sensor change for 2017-2020 vehicles equipped with a Milwaukee-Eight® (MKE-8) powertrain.
M1510
SERVICE BULLETIN M1510: MILWAUKEE-EIGHT ENGINE - NEW OIL FILTER. REVISION. PURPOSE: To inform dealers of an improved oil filter for the Milwaukee-Eight® (MKE-8) engine. The new oil filter uses the same synthetic 5-micron media as the current filter, however, the new oil filter effective media surface area was increased by 25%. The increased media supports the higher oil flow rate of MKE-8 engines. Fitment, clearance and performance testing has only been performed on MKE-8 vehicles. All Twin Cam vehicles continue to use the current oil filter.
PAB1084
GENUINE MOTOR PARTS AND ACCESSORIES BULLETIN PAB1084: SOFTAIL BACKREST PAD IMPROVEMENTS. Purpose: To inform dealers of design improvements for the Compact Passenger Backrest Pads. Some of these pads can become loose resulting in the backrest pad slipping on the sissy bar. The new backrest pads, designated with an ?A? revision, have been redesigned to fix this issue.
1HD-L9F4N-11
SERVICE BULLETIN M1466: STREET - UPPER STEERING HEAD BEARING SEAL. REVISION. Purpose: This bulletin informs dealers that Harley-Davidson has developed a new upper steering head bearing seal for fitment on Street models. The new seal replaces the current seal on the upper steering head bearing only. The lower steering head bearing seal will still use the current seal. Current service procedures and specifications remain the same.
1HDM5V2A05
TECH ARTICLE TA0023: TA0023: Crankshaft Rod Bearing. Purpose: Technicians have been falsely identifying connecting rod bearings as failed due to a perception of resistance as the rods are rotated. The clearance of the Twin Cam and Milwaukee-Eight® crank pin bearings are maintained to a very tight range. This optimizes performance and maintains low mechanical noise in operation. The connecting rod bore can also distort slightly in operation due to stress relaxation. As a result, bearing clearance decreases due to the contact zone broadening and the load being distributed over more rollers. The combination of a bore being slightly out of round and reduced bearing clearance can result in varying degrees of resistance through the range of motion. Axial clearance is also tightly controlled for proper alignment. For these reasons, zones of resistance can be found when the connecting rods are rotated by hand through their range of motion. Resistance during rod motion, by itself, is not an indication of a performance or durability concern.
1HDT2E2N05
SERVICE BULLETIN M1463: MILWAUKEE-EIGHT - ROCKER COVER GASKET INVENTORY PURGE AND REPLACE. Purpose: To inform dealers that previous rocker cover gasket design on Milwaukee-Eight? are prone to varying degrees of oil leaks. These leaks may occur on certain vehicles with different combinations of painted, polished and chrome parts. Purge inventory of old gaskets and replace with new gasket which has enhanced sealing features.
1HDQ4U5H05
SERVICE CALL TASK CT2018-005. During a fender assembly process some rear fenders may have been under torqued at the plant. Follow the steps in call task to repair MY2018 Softail Rear Fender Fasteners. Torque 28-37 Nm (21-27 ft-lbs.) as instructed in the service manual.
1HD-E4C2Y-12
TECH TIP TT462: TEAR-AWAY CABLE STRAP. Issue Description: Damage has occurred on some hand grips or brake levers when using side cutters to cut the cable strap that holds the keys in place. Reason for Tech Tip - The assembly plants are trying a new tear-away cable strap.
1HD-X3H4B-12
SERVICE BULLETIN M1450: MILWAUKEE-EIGHT EQUIPPED VEHICLES - LOSS OF POWER OR HIGH ENGINE BRAKING. Purpose: 2017 and 2018 model motorcycles equipped with a Milwaukee-Eight engine can experience a condition known as sumping during extended periods at high rpm or under heavy engine load. This bulletin provides the diagnostic procedure for determining if sumping is occurring.
1HD-G5V6H-12
CALL TASK: Jiffy stand screws part number 4687. Issue Description: a washer may have been incorrectly installed between jiffy stand bracket (Part No.50000137) and frame. During visual inspection, if the washer is present it must be removed.
1HDG4C4U11
SERVICE BULLETIN M1450: MILWAUKEE-EIGHT WITH STAGE KITS - LOSS OF POWER OR HIGH ENGINE BRAKING. Revision. Purpose: 2017 and 2018 model motorcycles equipped with a Milwaukee-Eight? engine and a Stage III or Stage IV kit can experience a condition known as sumping during extended periods in low gear, at high rpm or under heavy engine load. This bulletin provides the diagnostic procedure for determining if sumping is occurring.
1HDD4N4Q11
SERVICE BULLETIN M1454: 2018 TOURING AND SOFTAIL PLATFORMS - SCREAMIN' EAGLE STAGE II AND ADJUSTABLE PUSHROD INSTALLATION. Purpose: Dealers must order four washers (Part Number 6762D) separately when installing the kits listed on 2018 Milwaukee-Eight ®. The washers will be added to the kits on a later date. Required Dealer Action: Update the affected kits with washer stated when installing them on motorcycles. Refer to SIP (Service information portal) for the updated I-Sheets for the kits.
1HDW4S7Y11
SERVICE BULLETIN M1452: 2018 SOFTAIL INITIAL CARE PROGRAM. The purpose of this Initial Care Program is to monitor Harley-Davidson quality delivered to our customers. Harley-Davidson Technical Service is providing an Initial Care Program for 2018 Softail vehicles equipped with the various components listed. Pre-authorization from the Technical Service Initial Care Team is required for all warranty repairs of components and systems listed.
1HDR6U9Z11
SERVICE BULLETIN M1455: 2018 SOFTAIL MILWAUKEE-EIGHT 107 - CLUTCH PACK. Purpose: This bulletin informs dealers of a running change from a 9-plate clutch pack to a 10-plate clutch pack on 2018 Softail® models with a Milwaukee-Eight® 107 engine. When replacing any Milwaukee-Eight 107 Softail clutch pack, the 10-plate clutch pack is the correct fitment for the service part. Do not attempt to order a 9-plate clutch pack, it is not available. Do not mix components of 9-plate and 10-plate clutch packs as parts are not interchangeable.
1HD-R2F7Z-09
SERVICE BULLETIN M1452: 2018 SOFTAIL INITIAL CARE PROGRAM. The purpose of this Initial Care Program is to monitor Harley-Davidson quality delivered to our customers. Harley-Davidson Technical Service is providing an Initial Care Program for 2018 Softail vehicles equipped with the various components listed. Refer to Table 1 (in bulletin). Harley-Davidson is asking the dealer network to provide information on the parts listed in this service bulletin to Harley-Davidson Technical Service within 24 hours of a customer concern. The goal is to provide a rapid resolution that will enable Harley-Davidson to have our customer back on the road within 72 hours.
1HD-R5V4K-09
SERVICE BULLETIN M1451: ACCESSORY FUEL CAP FITMENT. Accessory fuel caps manufactured before model year 2018 should not be used on 2018 and later Softail® motorcycles. While these accessory fuel caps will physically fit the model year 2018 Softail models, they will not meet certain regulatory functional requirements. 2018 and later Softail models must use updated fuel caps which are identifiable by the gray colored threads. The updated fuel caps will retrofit on previous model year motorcycles.
1HD-F5K3A-09
TECH ARTICLE TA0020: Oil Tinted Orange or Pink. Description: Some vehicles arriving from the factory have an orange or pink tint to the oil. Reason: Vehicles are selected at the plant at random times to perform an audit inspection. During these audit inspections, a fluorescent dye is added to the oil which can be orange or pink. This dye is used to check for leaks, seeps, and weeps after the vehicle is put through a test ride. This dye is oil soluble and does not effect the performance of the oil or the vehicle. The dye may be found in any oil cavity on the vehicle. Action: No action is required if there is dye identified in the oil.
1HD-R6S7Y-09
SERVICE BULLETIN M1453: 2018 SOFTAIL DRIVE BELT DEFLECTION SPECIFICATION. This bulletin informs dealers that Harley-Davidson has updated 2018 Softail drive belt deflection specification since the owner's manual was printed. The specification printed in the owner's manual is no longer accurate. See Table 1 for updated table. The digital version of the Softail Owner's Manuals available on H-D.com and SIP (Service information portal) is accurate, as are the printed and digital versions of the Softail Service Manual. The previous specification does not effect belt durability or safety, but may cause increased belt noise.
1HD-N3S9A-09
PHONE CAMPAIGN: Dealer Product Quality Alert Request photos from dealers of warranty claims relating to cosmetic scratches on Heritage Softail windshields.
1HD-R7V8M-09
PARTS & ACCESSORIES BULLETIN PAB1067: SCREAMIN? EAGLE SMART TUNE PRO RELEASED FOR SHIPMENT. Purpose is to notify dealers that the Smart Tune PRO ? Automatic Tuning Module is 50-state U.S. EPA approved and released for shipment.
TA0006
Harley-Davidson is aware of conditions that may result in a streaking appearance or film residue on the inside of some instrument gauges including speedometer and tachometers. This may occur after exposure of the vehicle to humid conditions. This condition may remain even after the moisture has evaporated.
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.