Hello all I live in pacific beach Ca and i just built my first motorized bike. put it together in my second story apartment living room. Its a 48cc grubee skyhawk and ive put about 200mi on it so far. Still feels like I get more power every time i ride. I ride about 17mi round trip to work every day. Savin about 100 bucks a month on gas. only thing left to do is get an expansion chamber. Happy Times. good ridin everybody.