Honda TRX450R Service Manual page 332

CRANKCASE/TRANSMISSION/CRANKSHAFT/BALANCER (After '05)
INSPECTION
Check the gear shifter groove, dogs, dog holes and
teeth for abnormal wear or damage.
Measure the I.D. of each gear.
SERVICE LIMITS: M4: 28.05 mm (1.104 in)
M5: 28.06 mm (1.105 in)
C1: 22.07 mm (0.869 in)
C2: 30.07 mm (1.184 in)
C3: 28.07 mm (1.105 in)
Check the bushings for abnormal wear or damage.
Measure the O.D. of each bushing.
SERVICE LIMITS: M4, M5: 27.94 mm (1.100 in)
C1: 21.94 mm (0.864 in)
C2: 29.94 mm (1.179 in)
C3: 27.94 mm (1.100 in)
Measure the I.D. of each bushing.
SERVICE LIMITS: M5: 25.06 mm (0.987 in)
C1:19.06 mm (0.750 in)
C2: 27.06 mm (1.065 in)
C3: 25.06 mm (0.987 in)
Check the spline grooves and sliding surfaces of the
mainshaft and countershaft for abnormal wear or
damage.
Measure the O.D. of the mainshaft and counter-
shaft.
SERVICE LIMITS: at M5: 24.95 mm (0.982 in)
at C1: 18.94 mm (0.746 in)
at C2: 26.94 mm (1.061 in)
at C3: 24.94 mm (0.982 in)
Inspect the shift drum journals for scoring,
scratches or evidence of insufficient lubrication.
Check the shift drum guide grooves for abnormal
wear or damage.
SHIFT DRUM
16-14