i have an sdg pit bike that i bought from where i work ,the first bach that came in the country were from the usa the second from china yep and i got one from the second batch ,it has broken the drive shaft and the right side crank case, but i was lucky to get a kit from the usa it has larger dia drive shaft and the right side crank case,but at work we dont sell them any more to many broke down after six or so weeks we use to give 30 days warranty as some one else said you get what you pay for
