Honda TRX450R Service Manual page 306

CRANKCASE/TRANSMISSION/CRANKSHAFT/BALANCER ('04 - '05)
Inspect the shift drum journals for scoring,
scratches or evidence of insufficient lubrication.
Check the shift drum guide grooves for abnormal
wear or damage.
Check the shift fork shafts for abnormal wear or
damage.
Measure each shift fork shaft O.D.
SERVICE LIMITS:
Left and right: 11.97 mm (0.471 in)
Center: 10.97 mm (0.432 in)
Check the shift forks for abnormal wear or damage.
Measure the I.D. of each shift fork.
SERVICE LIMITS:
Left and right: 12.04 mm (0.474 in)
Center: 11.04 mm (0.435 in)
Measure claw thickness of each shift fork.
SERVICE LIMIT: 4.8 mm (0.19 in)
15-15