2018 Harley-Davidson Flhtcutg Technical Service Bulletins

72 technical service bulletins (TSBs) are on record for the 2018 Harley-Davidson Flhtcutg. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10180723Sep 16, 2020Engine cooling, Electrical system, Equipment. GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1105: SCREAMIN' EAGLE CALIBRATIONS & SMART TUNE UPDATES. PURPOSE: To inform dealers, that new Screamin’ 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.
• 10180722Sep 4, 2020Electrical system, Engine cooling. GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1103: SCREAMIN' EAGLE - NEW STAGE KIT CALIBRATION AVAILABILITY. PURPOSE: Revision. To inform dealers of Screamin’ 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 Screamin’ Eagle team expects to have all necessary 49-State calibrations by September 14…
• 10179456Aug 24, 2020Engine cooling. GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1104: HIGH-FLOW EXHAUST SYSTEM – FITMENT UPDATE. PURPOSE: To inform dealers of Screamin’ 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.
• 10179451Aug 24, 2020Engine cooling. GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1103: SCREAMIN' EAGLE - NEW STAGE KIT CALIBRATION AVAILABILITY. PURPOSE: To inform dealers of Screamin’ 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 Screamin’ Eagle team expects to have all necessary 49-State calibrations by September 07, 2020.
• 10179447Aug 24, 2020Engine cooling. GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1104: HIGH-FLOW EXHAUST SYSTEM – FITMENT UPDATE. PURPOSE: To inform dealers of Screamin’ 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.
• 10178101Jul 7, 2020Equipment, Electrical system. SERVICE BULLETIN M1464: BOOM! AUDIO - GENERAL INFORMATION AND SOFTWARE UPDATE 1.22.X. PURPOSE: Revision. This bulletin helps the dealer locate needed information to update and service Boom! Box Audio Infotainment systems. It also lists software revisions and the fixes addressed in each revision. This bulletin also replaces the following documents: TT431A: Software Download and Warranty Information, M1346: Boom! Box…
• 10177089Jun 5, 2020Engine cooling. 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.
• 10176175May 15, 2020Equipment, Electrical system. GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1097 INTERNATIONAL FITMENT: THE BOOM! BOX GTS SOFTWARE UPDATE. PURPOSE: To notify International dealers that International GTS radios are now available to be ordered and installed in 2014-2018 Touring, CVO Touring and Trike models previously equipped with 6.5 GT radios as retrofittable with additional parts and software as noted. Markets Affected: Only…
• 10173477Mar 19, 2020Engine cooling, Transmission and drivetrain. 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…
• 10173463Mar 19, 2020Transmission and drivetrain, Fuel system. 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…
• 10172226Feb 26, 2020Equipment, Electrical system, Transmission and drivetrain, Engine. 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…
• 10162967Jun 25, 2019Transmission and drivetrain. SERVICE BULLETIN M1492: 2017 - 2019 TOURING - MILWAUKEE EIGHT - INNER PRIMARY VENT. Purpose: Revision. Harley-Davidson has learned that a small percentage of dealers and customers are finding low transmission oil levels and high primary oil levels during normal maintenance intervals. This could indicate that oil is transferring from the transmission case to the primary housing through the transmission mainshaft. A…
• 10155120Feb 22, 2019Transmission and drivetrain. 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…
• 10139399Apr 27, 2018Transmission and drivetrain. 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…
• 10139400Apr 20, 2018Engine cooling. 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…
• 10135424Mar 7, 2018Steering. TECHNICAL SERVICE CALL TASK CT2018-002: 2018 TriGlide Front Stabilizer Inspection and/or Repair. A nonconforming Damper Mounting Bracket may allow for contact between steering stabilizer and engine guard. Call procedure to step through inspect/repair MY2018 TriGlide vehicles with a possible steering stabilizer contact engine guard at full-lock right turn.
• 10125153Nov 15, 2017Engine, Transmission and drivetrain. 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.
• 10124218Oct 11, 2017Engine cooling, Electrical system. SERVICE BULLETIN M1458: 2009 - 2018 TRIKE - SERVICE MANUAL SUPPLEMENT UPDATE. The purpose of this bulletin is to communicate updates to thereverse motor inoperative diagnostic procedure in the service manual supplement. A high percentage of reverse motors that have been returned are in good condition. The belief is that the 150 A circuit breaker is tripped, and not fully reset. This is causing the technician to…
• 10125141Sep 18, 2017Equipment, Electrical system. SERVICE BULLETIN M1442: BOOM! BOX INFOTAINMENT SYSTEM GENERAL INFORMATION AND SOFTWARE RELEASE 1.21.X DESCRIPTION. This bulletin helps the dealer locate needed information to update and service Boom! Box Audio Infotainment systems. It also lists software revisions and the fixes addressed in each revision.
• 10125156Jan 16, 2017Electrical system, Equipment. Service Bulletin M1430B: BOOM! BOX INFOTAINMENT SYSTEM GENERAL INFORMATION AND SOFTWARE RELEASE 1.20.X DESCRIPTION informs the dealer network that Boom! software version 1.20.3 released December 19, 2016 and is now available to download. This also provides notice that revision 1.20.2 was found to be corrupt. Do not install version 1.20.2 and delete any stored copies.
• 10195169Jan 27, 2016Electrical system. 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.
• 10193488Jan 27, 2016Electrical system. 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.

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