15. REAR BRAKE/REAR FORK/REAR WHEEL/REAR SHOCK ABSORBER DINK50/125 INSPECTION Measure the brake master cylinder I.D. Inspect the master cylinder for scratches or cracks. Service Limit: 12.75 mm (0.5 in) Measure the brake master cylinder piston O.D. Service Limit: 12.64 mm (0.5056 in) Before assembly, inspect the lst and 2nd rubber cups for wear. 15-16