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2017 Harley-Davidson FLHX Street Glide — 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 FLHX Street Glide.

Oil Sumping
High

Oil fails to scavenge from the crankcase at high RPMs, causing the flywheels to slog through oil, leading to power loss and extreme heat.

Addressed in later years with a revised oil pump; 2017-2019 owners often retrofit the 2020+ pump (62400247).
manufacturer tsb medium confidence
Fluid Transfer (Migration)
Medium

Oil migrates from the transmission through the main shaft into the primary case.

Common fix is installing a primary vent kit (H-D Part #26500027).
manufacturer tsb high confidence
Hydraulic Clutch Failure
High

The secondary clutch actuator can leak fluid internally, preventing the clutch from disengaging.

Subject of a major safety recall; check VIN for completion.
manufacturer tsb high confidence
Harsh Rear Ride
Low

The 'low profile' shocks only provide 2.1 inches of travel, leading to frequent bottoming out on bumps.

Design trait rather than a defect; most owners upgrade to taller shocks.
community pattern high confidence

Used Buying Inspection Checklist

What to look for when buying a used 2017 Harley-Davidson FLHX Street Glide.

Transmission Oil Level

Check for 'fluid transfer' where oil migrates from the transmission to the primary case.

Crankcase Sumping

On a test ride, check for sudden power loss or excessive heat, which indicates oil building up in the crankcase.

Hydraulic Clutch Actuator

Verify if the 2018 recall (18V-734) was performed; failing actuators lead to loss of clutch pressure.

Oil Cooler Line Clamps

Early 2017 models had a recall (17V-333) for improperly installed oil line clamps that could detach.