2020 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 2020 Harley-Davidson FLHRXS Road King Special.
Brake Light Software Bug
HighA software error can cause brake lights to stay illuminated without rider input.
Fluid Transfer
MediumOil migrating from the transmission into the primary case due to pressure differentials.
Compensator Noise
LowA 'clunk' or 'bang' sound on startup or low-speed lugging.
Used Buying Inspection Checklist
What to look for when buying a used 2020 Harley-Davidson FLHRXS Road King Special.
Primary Venting
Check if the primary vent (H-D service kit) was installed to prevent 'fluid transfer' from the transmission to the primary.
Oil Pump Version
2020 models received the updated 8-tooth scavenger gear oil pump which mostly fixed 'sumping' issues found in 2017-2019 models.
RDRS Functionality
If equipped with the optional RDRS, verify no dash codes for Traction Control or TPMS sensors.
Saddlebag Mounts
Inspect the quarter-turn fasteners inside the bags; they can vibrate loose if not properly seated.
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