fellow bikers the reason i bought one of these motors for my extra bike was to save on gas which is about $5 a gallon. i sometime pedal my other bike to work but i would also like to take this bike to work i work the little kinks. the only problem that i'am having is that the chain tensionor keeps creeping towards the spokes, and i have tighten them where i have stripped a couple bolts and had to buy new ones. please let me know if anyone else has had this problem and what they did to solve the problem. take care frank