2007-2009 Honda TRX300EX TRX300X service manual, Page 202Get this manual
CRANKCASETRANSMISSIONCRANKSHAFT Remove the dowel pins and gasket
Check the cam chain slider for wear or damage
CAM CHAIN SLIDER
TRANSMISSION
DISASSEMBLY
Separate the crankcase halves (page 12-7)Remove the washer, C1 gear and bushing from the cou nte rsh aft