7. CYLINDER/PISTON K-PIPE 50 Measure the piston O.D. Take measurement at 5mm from the bottom and 90 to the piston pin hole. Service Limit: 51.6mm replace if below Measure the piston-to-piston pin clearance. Service Limit: 0.10mm replace if over Measure the piston pin hole I.D. Service Limit: 13.06mm replace if over Measure the piston pin O.D. Service Limit: 12.944mm replace if below Measure the connecting rod small end I.D. Service Limit: 13.016mm replace if over 7-5