well I think you guys have succesfully answered my question: I will indeed pony up the extra dough for a 4 stroke kit. To be honest, the only reason I was inerested in the 2 stroke kits is because the motors themselves have a more 'classic motorbike' look, no plastic housing and pull start and what not. But looks aren't going to help me any stranded on the side of the road. After I build my bike, I plan to take long road trips with it (such as the Strugis rally, Daytona bike week, ect.) and I want to make sure the bike will get me there without having to carry an entire spare engine kit with me- which is what I've heard alot of the 2 stroke guys wind up doing.