2018 Harley-Davidson FLHTKL Ultra Limited Low — 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 FLHTKL Ultra Limited Low.
Oil Sumping
HighOil accumulates in the crankcase instead of returning to the tank, causing power loss and overheating.
Clutch Actuator Leak
HighInternal leak in the secondary clutch actuator can lead to the inability to disengage the clutch.
Transmission Fluid Migration
MediumFluid transfers from the transmission to the primary (or vice versa) through the clutch pushrod.
Used Buying Inspection Checklist
What to look for when buying a used 2018 Harley-Davidson FLHTKL Ultra Limited Low.
Verify if the 2018 clutch actuator recall (H-D Recall 0173) has been performed to prevent internal leaks.
Sumping Signs
Check the air cleaner for excessive oil residue, which can indicate a sumping issue in the M8 engine.
Transmission Fluid Level
Check both primary and transmission levels to ensure fluid isn't migrating between the two sumps.
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