2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 22Get this manual

2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 22

4Loosen the clamp securing the air cleaner to the front boot; then loosen the clamp securing the air cleaner to the rear
snorkel must be removed for this procedure NOTE: On the 400500, the seat assembly, side panels, and gas tank must be removed
for this procedure To check and adjust valvetappet clearance, use the following procedure 1Remove the timing inspection plug;
then remove the tappet covers (for more detailed information, see SectionServicing Top-Side Components)2Rotate the crankshaft
to the TDC position on the compression stroke NOTE: At this point, the rocker arms and adjuster screws must not have pressure
on them 3Using feeler gauge, check each valvetappet clearanceIf clearance is not within specifications, loosen the jam nut
and rotate the tappet adjuster screw until the clearance is within specificationsTighten each jam nut securely after completing
the adjustment CAUTION AF640DA 6Place the air cleaner cover into position and secure with the retaining clips The feeler