1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 167Get this manual
CRANKCASECRANKSHAFT TRANSMISSION COUNTERS HAFT ASSEMBLY Place the shim and countershaft into the caseNOTE When the shaft set, output shaft bearing holder, output shaft bearing andor gear case have been replaced, use shim of 1.00 mm (0.039 in) thickness for initial reference(1) ADJUSTMENT SHIM
(2) COUNTERSHAFT
Hea.t the output gear case around the countershaft bearing to SOC (176F)
Always wear gloves when handling heated gear case to prevent burning your handsCAUTION
Do not use torch to heat the output gear case; it may cause warpingDrive the countershaft into the case TOOLS: Driver, 40 mm I.D Attachment NOTE Check the backlash (page 10-17) and the gear tooth contact pattern (page 10-1S) before tightening the lock nut(2) ATTACHMENT