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.
M1510
Service Bulletin/Repair Instructions
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.
M1508
Service Bulletin/Repair Instructions
SERVICE BULLETIN M1508: 2009-2020 TRIKE PLATFORM - REVERSE MOTOR. PURPOSE: To inform dealers of a running change for the new reverse motor (Part No. 83388-09C) for Trike models. As of January 28, 2020 all Trike platform vehicles will be manufactured using the new reverse motor. The new reverse motor will be used to replace reverse motor assemblies (Part No. 83388-09, 83388-09A,83388-09B) that have failed diagnostics. Refer to Table 2. This motor contains several improvements for better motor durability.
M1509
Service Bulletin/Repair Instructions
SERVICE BULLETIN M1509: MILWAUKEE-EIGHT CYLINDER FLANGE NUT USAGE. To Inform dealers of a service manual change. This change affects the flange nut attaching the cylinder/cylinder head assembly to the cylinder stud in all MKE-8 (Milwaukee-Eight®) engines. The flange nut is one-time use and is replaced after removing. An additional change is the lubrication of the flange nut. Verify that only the bottom of the flange nut receives lubrication. Do not allow lubrication on the cylinder stud or on the internal threads of the flange nut. Motorcycles Affected: Vehicles with the MKE-8 engine From 2017 - 2020.
TT430
Service Bulletin/Repair Instructions
TECHNICAL TIP TT430: TWIN-COOLED SYSTEM DIAGNOSTICS. PURPOSE: Revision. Updated Basic Operation, Cooling System Pressure Cap, Loss of Coolant from Right Fairing Lower Overflow Hose for all Twin-Cooled Touring and Trike models with symptoms relating to cooling system issues.
TT466
Service Bulletin/Repair Instructions
TECHNICAL TIP TT466: UPDATED OIL PUMP FOR MILWAUKEE-EIGHT ENGINES. PURPOSE: Revision. To notify dealers that a new oil pump was put into production on some late 2019 and all 2020 Milwaukee-Eight® engines, all models. The new oil pumps are retrofittable to all previous years and models that have the Milwaukee-Eight engine. If replacing the oil pump on 2017 - 2019 vehicle with a Milwaukee-Eight engine and pump should only be install as a complete unit. It is important to note that the new oil pumps, or their internal components, are not compatible with old oil pump versions.
M1450
Service Bulletin/Repair Instructions
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. Sumping is when an excessive amount of oil is suspended in the engine crankcase and the flywheel must travel through the oil, resulting in loss of power or a high degree of engine braking and potential engine component damage with extended use under these conditions. This bulletin provides the diagnostic procedure for determining if sumping is occurring.
1HD-D8A8J-03
Service Bulletin/Repair Instructions
SERVICE BULLETIN M1359: 2014 - 2016 TOURING - HYDRAULIC CLUTCH LINE REPLACEMENT. PURPOSE: REVISION. A leak may occur on some Touring, CVO Touring, Police Touring and Trike models equipped with hydraulic clutch. The leak may occur when the line is replaced or when a P&A clutch line is installed. The area of the leak is at the joint where the clutch line attaches to the secondary clutch actuator (right side of the transmission). Required Dealer Action: Use Snap-on Flare Nut Socket (Part No. GAN85087B) and Snap-on Torque Wrench (Part No. QJR117F or similar) to tighten flare nut. Each time clutch line is installed or torque is adjusted to determine if leak is still present, bleed the clutch system.
1HDH4P5X01
Service Bulletin/Repair Instructions
GENUINE MOTOR PARTS AND ACCESSORIES BULLETIN PAB1081: SCREAMIN' EAGLE UPDATES. Purpose: To inform dealers of Screamin' Eagle® Pro Street Tuner software changes related to Stage II for Trike models and Smart Tune PRO improvements. The Screamin? Eagle team has identified and corrected integration issues which have triggered false diagnostic codes (P0134 and P0154) following Smart Tune PRO installation on some models. Update dealership computers with the latest Pro Street Tuner software. The software is available for update now through the normal update process. California update for the exceptions will be communicated as Harley-Davidson receive this approval.
1HD-F5E5Y-11
Service Bulletin/Repair Instructions
SERVICE BULLETIN M1458: 2009 - 2018 TRIKE - SERVICE MANUAL SUPPLEMENT UPDATE. REVISION. Purpose: The purpose of this bulletin is to communicate updates to the reverse motor inoperative diagnostic procedure in the service manual supplement. The procedure used in 2016 - 2018 Trike service manual supplements has been updated, however the procedure applies to all 2009 - 2018 Trike models. This bulletin also provides additional information which should be provided to Trike customers. This information is also in 2018 Trike owner's manuals.
1HD-Q2Y2U-11
Service Bulletin/Repair Instructions
SERVICE BULLETIN M1454: 2018 - 2019 MILWAUKEE-EIGHT - 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 - 2019 Milwaukee-Eight® engines. The washers will be added to the kits on a later date. Kit Part Numbers: 92500047 - Stage II Torque; 92500058 - Stage II Power; 17900058 - Adjustable Pushrod Kit.
1HD-H8V6V-11
Service Bulletin/Repair Instructions
SERVICE BULLETIN M1469: 2009 - 2018 TRIKE - REVERSE MOTOR REPAIR. REVISION. Purpose: To inform dealers of a new reverse motor repair kit. This kit is used to replace a failed reverse motor assembly rather than replacing the entire reverse motor, including the gear housing. This kit contains several improvements for better motor durability. New Reverse Motor Kit Part No. 31400129.