2018 Harley-Davidson FLHTK Electra Glide Ultra Limited — Common Issues & Known Problems
Known Issues & Owner Reports
These are the most commonly reported issues and concerns from owners, mechanics, and community forums for the 2018 Harley-Davidson FLHTK Electra Glide Ultra Limited.
Oil Sumping
HighOil accumulates in the crankcase instead of returning to the tank, causing power loss and potential engine damage.
Transmission-to-Primary Fluid Transfer
MediumA vacuum effect pulls oil from the transmission into the primary case through the main shaft.
Lifter Failure
HighStock lifters can fail prematurely, especially on bikes with performance cams or high mileage.
Used Buying Inspection Checklist
What to look for when buying a used 2018 Harley-Davidson FLHTK Electra Glide Ultra Limited.
Transmission Oil Level
Check for 'fluid transfer' where oil migrates from the transmission to the primary case.
Air Filter Housing
Check for excessive oil residue, which can indicate an 'oil sumping' issue (TSB M1450).
Heated Grip Operation
Common failure point on high-mileage touring bikes; expensive to replace due to internal wiring.
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