What 70cc kit would fit in my Yamaha MJ50 Towny? Or is there a larger motor that I would be able to "drop in"? I would like for it to go around 40-45mph. Im 210lbs and it goes about 26mph against the wind and does 30 when your not fighting the wind so much. Also, would this kit give me better off the line acceleration? What would be some upgrades that I can do to this besides the engine that will be affordable? What would you guys recommend I do? Im new to mopeds by the way and this is my first one. Im learning about how to fix it myself. I would also like any tips if you guys have any. Thanks :)