Loss of oil pressure, power, and engine failure at highway speed due to oil sump and failure of oil pump. Vehicle was traveling at highway speed on restricted access road.
The worst 2018 Harley-Davidson Flhtk problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Engine2
- Transmission1
- Wheels1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Engine2
- Transmission1
- Wheels1
Recalls 2
Visibility
- What is wrong
- Harley-Davidson Motor Company (Harley-Davidson) is recalling certain Touring and CVO Touring motorcycles, including 2017-2019 FLHTCU, FLHTCUL, FLHTK ANV, FLHTKL, FLTRU, FLHTK, and 2016-2019 FLHTKSE, FLHTKSE ANV, and FLTRUSE models equipped with a Harley-Davidson Detachable Tour-Pak Luggage Conversion Kit (Part numbers 53000291, 53000291A, and 53000567). The kit did not include replacement rear red reflectors for the ones that are eliminated by installing this kit. As such, these motorcycles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Associated Equipment."
- Risk
- Without the rear red reflectors, the motorcycle has reduced visibility to other drivers, increasing the risk of a crash.
- Remedy
- Harley-Davidson has notified owners, and dealers will install the replacement reflectors, free of charge. The recall began August 19, 2019. Owners may contact Harley-Davidson customer service at 1‑800‑258‑2464. Harley-Davidson's number for this recall is 0629.
Recall number 19V574000 · Recall details
Power train: clutch assembly
- What is wrong
- Harley-Davidson Motor Company (Harley-Davidson) is recalling certain 2017-2018 Police Road King (FLHP), Road King (FLHR), Road King Special (FLHRXS), Electra Glide Ultra Classic (FLHTCU), Ultra Limited (FLHTK), Ultra Limited Low (FLHTKL), Ultra Limited Shrine (FLHTK SHRINE), Police Electra Glide (FLHTP), Street Glide (FLHX), Street Glide Special (FLHXS), Road Glide Ultra (FLTRU), Road Glide (FLTRX), Road Glide Special (FLTRXS), Freewheeler (FLRT), Tri Glide Ultra (FLHTCUTG), CVO Limited (FLHTKSE) and CVO Street Glide (FLHXSE) motorcycles, 2017 Softail Slim S (FLSS), Fat Boy S (FLSTFBS) and CVO Pro Street Breakout (FXSE) motorcycles, 2018 115th Anniversary Ultra Limited (FLHTK ANV), 115th Anniversary Street Glide (FLHX ANV), 115th Anniversary Street Glide Special (FLHXS ANX), 115th Anniversary Tri Glide Ultra (FLHTCUTG ANV), 115th Anniversary CVO Limited (FLHTKSE ANV) and CVO Road Glide (FLTRXSE) motorcycles. The secondary clutch actuator cylinder may leak fluid internally and the clutch master cylinder may lose the ability to generate enough lift to disengage the clutch.
- Risk
- If the clutch cannot be disengaged it can result in a loss of control, increasing the risk of a crash.
- Remedy
- Harley-Davidson will notify owners, and dealers will install a new secondary clutch actuator piston assembly, free of charge. The recall began November 5, 2018. Owners may contact Harley-Davidson customer service at 1‑800‑258‑2464. Harley-Davidson's number for this recall is 0173.
Recall number 18V734000 · Recall details
Technical service bulletins for the 2018 Harley-Davidson Flhtk 86
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- TIRE TREAD DEPTH GUIDE-UPDATE. PURPOSE: [Revision C. Updated: Tire Tread Depth Guide
- Battery warranty guidelines
- BATTERY WARRANTY GUIDELINES. PURPOSE: [Revision F. Added: Added video link for the DCA-8000 Battery Tester
- TIRE TREAD DEPTH GUIDE-UPDATE. PURPOSE: [Revision B. Updated: Tire Tread Depth Guide
- Battery warranty guidelines
- Digital technician II - updates and release notes
- Cosmetic cylinder staining (all milwaukee-eight models)
- Digital technician II - updates and release notes
- Digital technician II - updates and release notes
- Digital technician II - updates and release notes
What 2018 Harley-Davidson Flhtk owners say
Most recent owner complaints, unedited.
Tire developed slicing in the tread have had multiple harley dealers tell me they have seen this problem
When slowing for a stop the engine will stall when the clutch lever is pulled in. The bike must be switched off then back on and restarted. This is an intermittent problem that the dealer could not reproduce. However, a little research on internet shows a lot of owners with the new milwaukee 8 engine are having this issue.
Head bolt broke on front cylinder of engine causing head gasket to fail, which LED to oil leak from head gasket. This LED to engine oil being leaked onto side of motorcycle as well as on passenger boots and onto rear tire. This occurred while vehicl was travelling on highway with engine at operating temperature .wasinformed by harley master tech that they had seen this on numerous occasions
Compare the 2018 Harley-Davidson Flhtk
Other model years
Questions about the 2018 Harley-Davidson Flhtk
Is the 2018 Harley-Davidson Flhtk reliable?
Owners have filed 4 complaints about the 2018 Harley-Davidson Flhtk, fewer than a typical Flhtk model year.
What is the 2018 Harley-Davidson Flhtk year score?
The 2018 Harley-Davidson Flhtk scores 88 out of 100 (good). The score compares it with the other model years of the Harley-Davidson Flhtk: 75 is a typical year, 50 means twice the usual complaints, and serious complaints and recalls lower it.
What is the most common problem with the 2018 Harley-Davidson Flhtk?
Engine and cooling, with 2 complaints. Next is transmission (1).
How many recalls does the 2018 Harley-Davidson Flhtk have?
2 recalls, covering visibility and power train.
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