ive got it accelerating insanely fast compared to original
thanks to -82 cc's doppler streetcup pipe 19mm carb etc
but i can detect something flexing during the first 3 seconds of acceleration. then it disappears.
can anyone suggest what it most likely is? what are the weak areas of 50v's?
its definitely not front end, and it seems to be coming from rear of engine to back wheel. like a vibration or flexing ? im aware of what it could be but i can imagine there is always one area that need beefing up.