The most reasonably priced component used on the Xr250 1980 (a) Usa Swing Arm / Drive Chain is the Screw,cross 5x10.
forty-five components are shown in this Xr250 1980 (a) Usa Swing Arm / Drive Chain exploded diagram.
The Swing Arm / Drive Chain is made up of components including this Swingarm, Rr. *nh1* which is the most expensive.
