Don't give up on the cns2 before you try it. I have two bikes, one has the n/t the other the cns2. The bike with the cns2 runs better and is faster than the other. You will have to tune the cns2 to your engine but after that it should be o/k. Mine is on a 48cc, Biknut did alot of work on a cns2 on a 66cc. The link below may help.