And after you get it off take it apart and clean it good so the spring will pop the shaft out easy.when ya start to put it back on push the shaft all the way back tighten the bolt so the shaft stays back and after you get it back on loosen the bold and let it pop back into the chain and tighten the bolt and lock nut.I was gave a motor that someone told the guy it was going to have a cam chain because it had jumped timing.I got it home and the cam chain adj was stuck.put it back in time and fired it up and still running today yeah 3 bolts...