hi, as john says itll be a prob with the clutch, ive had two of these "clone" type bikes for my son. the springs on the cent clutch arnt the best and also the woodruff key which drives the clutch shatters aswell which stops your clutch turning, if the brake is ok then go straight for the clutch or even more obvious the chain snapped :) lol but im sure youve checked that ;)
andy, December 2007