2021 Harley-Davidson FLHXS Street Glide 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 2021 Harley-Davidson FLHXS Street Glide Special.
Brake Light Illumination Recall
MediumNHTSA Recall 22V907: The brake lights may illuminate regardless of whether the rider applies the brakes, potentially confusing other drivers.
Cable Clutch Fatigue
LowThe switch from hydraulic to cable clutch in 2021 resulted in a heavier lever pull for some riders and requires more frequent maintenance.
Engine Sumping
HighA condition where oil accumulates in the crankcase, causing power loss and potential engine damage. While largely resolved by 2020 with a new oil pump, some 2021 owners still report issues under sustained high-speed riding.
Used Buying Inspection Checklist
What to look for when buying a used 2021 Harley-Davidson FLHXS Street Glide Special.
Infotainment Screen
Check for 'ghost touches' or delamination on the GTS screen, which can be expensive to replace.
Oil Leaks
Inspect the bottom of the primary and transmission cases. While later M8s are reliable, early 114s can occasionally show signs of 'sumping' or fluid transfer.
Service History
Verify the 1,000-mile break-in service was performed by a certified technician to ensure warranty compliance and proper engine seating.
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