7. CYLINDER/PISTON ZING II 125 Inspect the top of the cylinder for warpage. Service Limit: 0.05 mm repair or replace if over Measure the connecting rod small end I.D. Service Limit: 15.06 mm replace if below PISTON RING INSTALLATION Install the piston rings onto the piston. Apply engine oil to each piston ring. Top · Be careful not to damage the piston Second and piston rings during assembly. Side Rail · All rings should be installed with the Oil Ring markings facing up. Side Rail · After installing the rings, they should rotate freely without sticking. · Stagger the ring end gaps as the figure shown. 7-6