Re: 50cc GY6 on a Bicycle??
I also have a modded 150 GY6 in a Ruckus clone. They are excellent engines, there are a ton of mod parts for them and they are cheap. Being in the flats I exchanged final drive gears for a much taller ratio. It will top just over 70 but it has a much more relaxed cruise at the 55/60 where I like to ride. It would be an interesting build around a bicycle. Would certainly require some wheel/tire/brake upgrades. Cool thing is these power units are super reliable even modded, and the CVT is highly tunable.