Hi my name is Rick and I live in Helena Mt. I just bought a motor {2cycle} 58cc from the vender in Bozeman Mt. and a jackshaft kit from sick bike.com. I started to put it on my new trek mountain bike but stopped when I could see too many problems ahead.(the frame is funny on this bike) I am now looking at a couple other bikes and will buy one this week. I read in the forums about taking this engine apart and replacing many of the bolts and nuts and putting tread locker on all. Got the hardened nuts, bolts and tread locker but I think I will need a set of pulley pullers and a new torque wrench first. Oh I didn't get the cheap engine, but went a step up and got a chromed out one. I'm hoping it is of a little higher quality. I almost went with a Staton kit but got this shiftable setup for about half the price. I may yet get a Jap 2 stroke at some point and make my own mounts to get it down in the frame and hooked to this jackshaft.We'll see.