2001-2006 Honda TRX 300EX Sportrax 300EX Factory Service Manual, Page 52Get this manual
MAINTENANCE
VALVE CLEARANCE
Inspect and adjust th velve clearance while th e
engine is cold (below 35C95FIRemove Ihe fuel tenk (page 2-10J
Remove the bolts lind velve adjuster covers
Remove the crankshaft hole cap and liming hole cap
Turn the crankshaft cou nterclockw ise, align the MT mllrk on the flywheel with the Index mark the left crankCllse coverMake sure the piston is al ToC (Top Dead Centerj of the compreslion strOke by moving Ihe ocker