2005-2006 Honda ATV TRX500FE/FM/TM FourTrax Foreman Factory Service Manual, Page 212Get this manual
CRANKCASETRANSMISSIONCRANKSHAFTBALANCER INSPECTION GEARBUSHINGSHAFT Check the shifter groove for abnormal wear or damageCheck the gear dogs and teeth for abnormal wear or damageIf there is damage to the gear dogs, check the slots or dogs on the corresponding engagement gear for damageGEAR DOG
SLOT Measure the I.Dof each gearSERVICE LIMITS: M4: 25.05 mm (0.986 in) M5: 20.05 mm (0.789 in) C1, C2, C3, CR: 28.07 mm (1.105 in) Reverse idle: 13.04 mm (0.513 in)