possibly might be the steering cone or the front wheel bearing spoil.or u can check the rear wheel maybe when u adjusted the chain u didnt align it properly.Originally posted by NewBieZzz:My bike when travelling at speeds of 60km/h and above, the handle bar will start to shake violently when i free my hands from the handle. Anybody experienced this before? can help me? cause when going fast or cornering, i can feel the handle shiver... Pls Help...