2004 Arctic Cat ATVs factory service and repair manual, Page 183Get this manual
ECamshaft alignment pin and sprocket alignment hole (smallest) are aligned A CAUTION
If any of the above factors are not as stated, go back to step 10 and carefully proceed
Install the cylinder head plug in the cylinder head with the open end facing the camshaftRemove the cap screw from the end of the chain tensioner; then account for the plunger, spring, and O-ring
20Depress the spring-loaded lock and push the plunger into the tensioner