2001-2005 Honda TRX250EX Sportrax TRX250EX Factory Service Manual, Page 95Get this manual
CYLINDER HEADVALVE INSTALLATION Remove the oil check bolt (6-mm bolt) and sealing washer from the cylinder head coverBlow open oi passages in the cylinder head cover with compressed ai rReinst all the oil check bolt with new sealing washer and tighten the bolt
Turn the crankshaft coun terclockwise and align the ur mark on the fl ywhee with the index mark in the rear crankcase cover
INDEX MARK