Harley-Davidson Softail, FLS/FXS

Clutch fluid capacity & service interval

Harley-Davidson Softail, FLS/FXS models require clutch fluid. Service intervals include checking at 8000 km and changing every 24 months. The data covers 4 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
FLSS Softail Slim S (2017-2017)
  • Use: Normal
  • Between min and max.
  • Check 8000 km
  • Change 24 months
FLSTFBS Fat Boy S (2017-2017)
  • Use: Normal
  • Between min and max.
  • Check 8000 km
  • Change 24 months
FXSE CVO Pro Street Breakout (2017-2017)
  • Use: Normal
  • Between min and max.
  • Check 8000 km
  • Change 24 months
FXSE CVO Pro Street Breakout (2016-2016)
  • Use: Normal
  • Between min and max.
  • Check 8000 km
  • Change 24 months

Additional Notes

  • All four configurations in the Harley-Davidson Softail FLS/FXS lineup covered here use a hydraulic clutch system, meaning clutch fluid is housed in a reservoir rather than a cable-actuated mechanism, and the fluid level is measured against fixed minimum and maximum markers on that reservoir.
  • The specified fill level for each configuration is between the minimum and maximum marks, which reflects a service-level check rather than a measured volumetric capacity, consistent with how hydraulic clutch reservoirs are serviced in the field.
  • The check interval across all four configurations is 8,000 km under normal use conditions, meaning routine inspections are tied to mileage accumulation rather than a fixed calendar period.
  • The fluid change interval is 24 months for all four configurations under normal use, making calendar time the governing factor for replacement regardless of distance traveled.
  • The FXSE CVO Pro Street Breakout appears in both 2016 and 2017 model years with identical clutch fluid specifications, while the FLSS Softail Slim S and FLSTFBS Fat Boy S are each listed only for the 2017 model year.

Other Systems