2006 Honda TRX680 Rincon Factory Service Manual, Page 251Get this manual
ALTERNATORSTARTER CLUTCH Remove the sprag clutch from the clutch outerCheck the clutch outer and sprag clutch for abnormal wear or damageCLUTCH OUTER SPRAG CLUTCH
Check the starter driven gear teeth and needle bearing for wear or damageMeasure driven gear boss O.DSERVICE LIMIT: 51.61 mm (2.032 in)
STARTER CLUTCH ASSEMBLY
Lubricate the sprag clutch with engine oil and install it into the clutch outer with the flanged side facing the flywheel side