1985-1987 Honda TRX 250 Fourtrax 250 Service Manual, Page 124Get this manual
CRANKCASECRANKSHAFTTRANSMISSION Measure the .0 of the countershaft and reverse idler shaft SERVICE LIMITS :
21 .93 mm (0 .863 inl 16.95 mm (0 .667 In) 13 .93 mm (0.548Inl
Calculate the gear bushing-tashaft clearanceSERVICE LIMIT: .10 mm (0.004 in)
Check the transmission bearings for excessive play or damage and replace if necessary
BEAR ING REPLACEMENT
Crush the convex portion of the orifi ce plate in the mainshaft bearing hole to set the bearing remove expander properly Remove the mainshaft besring from the left crankca se TOOLS Bearing remover, 17 mm Remover handle