2017 Harley-Davidson FLHRXS Road King Special — 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 2017 Harley-Davidson FLHRXS Road King Special.
Oil Sumping
HighOil accumulates in the crankcase instead of returning to the tank, leading to power loss and potential engine seizure.
Transmission Fluid Transfer
MediumFluid migrates from the transmission to the primary through the pushrod tunnel.
Oil Cooler Line Detachment
HighImproperly installed clamps can cause the oil line to pop off, spraying oil on the rear tire.
Used Buying Inspection Checklist
What to look for when buying a used 2017 Harley-Davidson FLHRXS Road King Special.
Oil Cooler Line Clamps
Check for evidence of the 2017 recall fix (NHTSA 17V333) to prevent sudden oil loss onto the rear tire.
Secondary Clutch Actuator
Verify the 2018 recall (NHTSA 18V734) was performed; faulty units leak fluid internally, preventing clutch disengagement.
Oil Sumping Signs
Look for oil in the air cleaner or blue smoke on startup; early M8 oil pumps (2017-2019) were prone to failure.
Transmission Fluid Level
Check for 'fluid transfer' where transmission oil migrates into the primary case due to a pressure differential.
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