Need complete crankcase. Main thing must shift thru gears OK. Present crankcase - I don't know. I've spent a lot of time getting it to shift but it binds badly. As soon as I put in the drum guide pin it binds. The gear shift lever itself is bent. I'm thinking previous rider was pretty hard on it and there's enough stuff bent that I can't get it to shift. I have a good cylinder/pistons/head - now need a functioning transmission.