This is my first time doing , took me two nights to have everything a part. Nothing too difficult. You just need the fly wheel puller and a gear jammer. Don't need no manual, follow this http://www.supermotojunkie.com/showthread.php?60551-A-HOW-TO-610-Cam-Chain-Replacement& Hall's Cycle, Cam chain is 60 bucks. Add another 30-40 for gaskets and washers.