Ok, so I have 2003 suzuki z400. Whenever I try to burn out, or sometimes when i get on it, it makes a grinding noise like something is slipping. let off and it stops. Also if im gonna get the front end up, and i let off the throttle completley and hit it, it does it too. but not if i keep pressure on it. Is it possible my clutch is shot? or is it my transmission? Need help please. Thanks Adam