7. CYLINDER/PISTON Pulsar CK 125 Measure the cam follower shaft O.D. Service Limit: 11.95mm replace if below Check the push bar for bending and steel balls for wear or dropping. Measure the push bar length. Service Limit: 141mm replace if below Faulty (IN/EX) PISTON INSTALLATION PISTON RING INSTALLATION First install the third ring side rail onto the piston and then install the oil ring, side rail, second ring and the top ring onto the piston. Apply engine oil to each piston ring. Top Second · Be careful not to damage or break the piston and piston rings. Oil · All rings should be installed with the English markings facing up. · When assembling the piston rings, do not expand the ring end gap larger than 8 times of its thickness. · After the rings are installed, they should rotate freely without sticking. 7-6