2001-2006 Honda TRX 300EX Sportrax 300EX Factory Service Manual, Page 182Get this manual
CRANKSHAFTTRANSMISSION Check the ffiainshaft and countersha ft for abnormal wear or damageMeasure he mainshaft .0 al th gear bushingseRVICE LIMIT: M5: 21 .93 mm (0 .863 in)
Measure the countershaft .0 81 the C2 and C3 gear
bushingsSERVICE LIMITS: C221 .93 mm (0.863 Inl
C324.93 mm (0.981 Inl
Measure the idle gear shaft 0.0SERVICE LIMIT: 13.93 mm (0.548 inl
IDLE GEAR SHAFT