cmb271
Member
I really don't understand how with the years put into research and development of motorized bicycles how come no one has come up with a shift kit for the 4 stroke engine, I do understand that their is a clearance issue but a shift kit could help with speed, climbing hills and while some people would say go to a 2 stroke, I had a 2 stroke and that thing was a lot more trouble then it was worth to me and after a good 30 mins of riding it would vibrate so bad I couldn't sit while accelerating unlike the 4 stroke where I can go full on and sit somewhat comfortably. I need a shift kit for speed but I need a 4 stroke so I'm not standing all the time, there's always an option but i'm just not seeing it.