2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 201Get this manual
CENTRIFUGAL CLUTCH
SERVICE INFORMATION
GENERAL
This section covers service of the centrifugal clutch and change clutchThese parts can be serviced with the engine installed in the frame The automatic transmission unit and engine lubricating oil from the filter is fed through the oil passages in the front crankcase cover The clutch will not engage properly if the engine oil contains additives such as molybdenum disulfideOils with molybdenum disulfide additive tend to reduce clutch friction Engine oil viscosity and level and the use of oil additives have an effect on clutch disengagementOil additives of any kind are not recommendedWhen the clutch does not disengage or the vehicle creeps with the clutch disengaged, inspect the engine oil viscosity and level before servicing the clutch system
SPECIFICATIONS
Unit: mm (in) ITEM Clutch Drum I.DWeight lining thickness Clutch spring height Clutch weight spring free length Clutch drum boss I.DCrankshaft O.Dat clutch drum 3.0 (0.12) 3.72 (0.146) 23.2 (0.91) 29.000 29.020 (1.1417 1.1425) 28.959 28.980 (1.1401 1.1409) STANDARD 150.0 150.2 (5.906 5.913) SERVICE LIMIT 150.4 (5.92) 2.0 (0.08) 3.6 (0.14) 24.1 (0.95) 29.05 (1.144) 28.93 (1.139)