How do you adjust timing chain on an ATV?

Disassemble the engine and remove the camshaft and chain. Assemble with everything aligned correctly. For specific details research your ATV model for instructions.

***There should be a cover over the Camshaft gear. That's the cover to remove. Once removed there will be a chain tensionor that you will need to remove (either automatic or manual) once removed you could loosen the bolt holding the cam gear in place.

There will be a nut on your flywheel cover for viewing the mark for TDC. There will also be a mark in your cam gear housing to lign up with the mark on your cam gear. - Look up specifics for your model mudder.. *** Hope that helps. You should always refer to a service guide for instruction.