i have just bought an 84 xt 6oo... it starts fine and rides ok only in first gear tho . . i have taken the clutch assembely all of and behind it is a gear slecter (looks like a hammer that moves the main gear spocket up and down the gears when u move the gear leaver)altho the spring has snapped and i need a new one ... does n.e one understand what im goin on about and can n.e one tell me were 2 purches these parts second hand or new .. fanxs