2001-2005 Honda TRX250EX Sportrax TRX250EX Factory Service Manual, Page 117Get this manual
CYLINDERPISTONCAMSHAFT CAM CHAINTENSIONER ARM Check the slipper surface of the cam chain tensioner arm for wear or damage
INSTALLATION
Rotate the crankshaft counterclockwise and align the mark on the flywheel with the index notch in the rear crankcase coverNOTE: Make sure that the piston is at TDe (Top Dead Center)
INDEX MARK