1998-2001 Honda Fourtrax Foreman TRX450S, TRX450ES Factory Service Manual, Page 205Get this manual
CRANKSHAFTIBALANCERTRANSMISSION Disassembfe the maioshatt and countershaftNOTE:
COUNTERSHAFT
Keep track of the disasse mbled parts (gears, bushings,washers, and snap rin gs) by stacking them on too or slipping them onto piece of wire, Do not ex pand the snap ring more than necessary for removalTo re move snap ring, expand the snap ring and pull it off using the gear behind it
MAINSHAfT
Check the gea dogs, dog he as and teeth or abnormal ear or lack of lubrication
Measure the I.Dof each gearSERVICE UMIT$: C1 C2C3, CR: M4, M5
28.07 mm (1.105 in) 25.05 mm fO.986 in)