Hey guys Im doing a base gasket for a friend on his 05ish raptor 350. his gasket cracked and oil started spewing out by the base gasket. I have all the motor bolts out and covers off, but can't get the timing chain off. There is a 17mm bolt holding the gear on, but when I turn it, I just spin the motor over. I don't have air tools so is there any other way to get this off. Also how do I set the timing when i'm all done. I made marks on the chain/case/gear to line it all up.