2018 Harley-Davidson Flhx Technical Service Bulletins

71 technical service bulletins (TSBs) are on record for the 2018 Harley-Davidson Flhx. 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.

• 10179454Aug 31, 2020Engine cooling. GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1093: NEW 2020.5 SCREAMIN' EAGLE PRODUCT UPDATES. PURPOSE: Revision. To inform dealers of additional Screamin’ Eagle® 128/131 Stage IV Kit and 131 Crate Engine information.
• 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.
• 10179445Aug 14, 2020Suspension. GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1101: TOURING MODELS - SUSPENSION LOWERING KITS - FITMENT UPDATE. PURPOSE: To notify dealers of a fitment update to certain suspension lowering kits for Touring models. Some front and rear accessory suspension lowering kits for Touring models have updated fitment statements to include certain 2020 Touring models. These accessory kits are Original Equipment (OE)…
• 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…
• 10176926Jun 9, 2020Suspension, Equipment. TECHNICAL TIP BULLETIN TT413: 2009 - 2020 TOURING REAR FORK RUSTY WATER LEAKAGE. PURPOSE: Revision. Some 2009 - 2020 Touring, Touring CVO, Touring Police models exhibit drainage of rusty water from the rear fork (where the debris deflector mounts), which has raised customer concern. Updated Model Years. NOTE: This is a cosmetic concern and not an indication of an internal issue.
• 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…
• 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…
• 10153989Jan 22, 2019Transmission and drivetrain, Steering. TECH ARTICLE TA0016: 2014 and Later Touring Steering Head Bearing Adjustment. Purpose: During recent dealer visits to observe steering head bearing adjustment process, Harley-Davidson staff observed that some dealers are not correctly following the service manual steering head bearing adjustment process. Issue: Steering head bearings on 2014 and later Touring, CVO Touring and Police Touring motorcycles which may…
• 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…
• 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.
• 10125151Nov 15, 2017Brakes. 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.
• 10125147Sep 1, 2017Brakes. Phone Campaign - Request for dealers to inspect Touring rear disc mounting screws to investigate if potential under-torque condition issue is present.
• 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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