Re: 230 on a 49cc engine?
i am 220+ running a huffy cranbrook and a 65.9cc 2 stroke cruise around 25 with a stock sprocket wide open throttle is not suggested for long periods of time it would be like topping your car gas pedal to the floor and never letting up imminent failure eventually. remember it is a Bicycle and not made for high speed. Make sure it has good brakes and enjoy buzzing around town and thru the trails.
there is my two cents