7. CYLINDER/PISTON ZING II 125 Measure the piston pin O.D. Service Limit: 14.96mm replace if below Measure the piston O.D. Take measurement at 9mm from the bottom and 90° to the piston pin hole. Service Limit: 52.30mm replace if below Measure the piston-to-piston pin clearance. Service Limit: 0.02mm replace if over CYLINDER INSPECTION Inspect the cylinder bore for wear or damage. Measure the cylinder I.D. at three levels of top, middle and bottom at 90° to the piston pin (in both X and Y directions). Service Limit: 52.50mm repair or replace if below Measure the cylinder-to-piston clearance. Service Limit: 0.1mm repair or replace if over The true roundness is the difference between IN EX the values measured in X and Y directions. The cylindricity (difference between the Top values measured at the three levels) is subject to the maximum value calculated. Middle Service Limits: True Roundness: Bottom 0.05mm repair or replace if over Cylindricity: 0.05 mm repair or replace if over 7-5