10.FINAL REDUCTION/ TRANSMISSION SYSTEM MXU 250R/300R INSPECTION Measure the guide bar runout. Out of specification Replace. Service Limit: Less than 0.03 mm (0.0012 in) Do not attempt to straighten a bent guide bar. Shift Fork Cam Follower Inspect the shift fork cam follower and shift fork pawl. Scoring/beads/wear Replace. Shift Fork Cam Pawl Check the shift cam groove and shift cam gear. Wear or damage Replace. Inspect shift shaft gear. Damage Replace. Inspect shift shaft. Damage/bends/wear Replace. Check the return spring for fatigue or damage. 10-31