- Operating this motorized bicycle or bicycle engine kit involves some risk of serious bodily injury . Buyer accepts responsibility for any and all vehicle operation that may lead to personal injury, economic loss, social distress, other losses, costs and damages.- Seller is not responsible for injuries and/or damages resulting from operating this motorized bicycle or bicycle engine kit.- Not all motorized bicycles are permitted for road use. Check with your local Vehicle Insurance services for requirements. We do offer any guarantee for legal road use.- Although this kit fits MOST bikes, we cannot guarantee that this kit will fit your individual bike. Returns due to size are not accepted.- Due to California Air Resource Board Regulations we cannot ship engine kits to California- Our gasoline operated products are NOT compliant with environmental protection Agency ( E.P.A. ) or California Air Resources Board (C.A.R.B) for the use on/off Public roads. Upon purchase, the buyer agrees to use products for racing (closed-course competition) only and NOT for on/off public roads.