That being said lmao not to jump threads like spidey but that ms660 top end is what i was debating on putting on my bare brand new crankcase once i split my broke ones and square them away and figure out pressing the bearing in and out and what i can use to do the filling of the ports i seen not sure what epoxy that was on in there or what but i feel a pissed off half racing chainsaw/ MB would be sweet lol but honestly these bikes are the only ones ive ever rode that wasent powered by my sweat and pride lol other than one 49cc dirt bike me and an old friend smashed up jumping over his old septic hill lol