15. REAR WHEEL/AXLE/SUSPENSION DRIVING MECHANISM MXU 300/250 Thrust Covers Inspect the swingarm. Crack/bend/damage Replace. Roll the pivot bolt on a flat surface to inspect the pivot shaft. Bends Replace. Do not attempt to straighten a bent bolt. Inspect the thrust covers, collar and bushes. Wear/damage Replace. Collar Inspect the drive chain stiffness. Stiff Clean and lubricate or replace. 15-19