15. REAR BRAKE/REAR FORK/REAR WHEEL/REAR SHOCK ABSORBER DINK50/125 INSPECTION Check the piston for scratches or wear. Measure the piston O.D. with a micrometer gauge. Service Limit: 25.3 mm (1.012 in) Check the caliper cylinder for scratches or wear and measure the cylinder bore. Service Limit: 25.45 mm (1.018 in) 15-20