2006-2009 Honda TRX250EX/TRX250X Service Manual, Page 215Get this manual
CRANKCASETRANSMISSIONCRANKSHAFT Check the transmission gears for freedom of movement and rotation on the shaftApply engine oil to the gear teeth and shaft journalsEngage the mainshaft and countershaft gears-: Gear teeth and shaft journals
COUNTER$HAFT
Position the crank weights so that they do not interfere with the mainshaftTake care not to
drop the thrust washer on Ihe malnshafr
Instat! the mainshaft and countershatt as an assembly into the rear crankcase, being careful not to damage the countershaft oil seaL