Yamaha Motor Co., Ltd. YFM7FGPW — CYLINDER AND PISTON

2. Install: piston 1 piston pin 2 piston pin clips 3 1 New a NOTE: _ Apply engine oil to the piston pin. Make sure the punch mark a on the piston points towards the exhaust side of the cylin- der. Before installing the piston pin clips, cover the crankcase opening with a clean rag to prevent the clips from falling into the crank- case. 2 3 New 3. Install: cylinder gasket dowel pins 4. Lubricate: piston piston rings cylinder (with the recommended lubricant) New 5. Offset: piston ring end gaps a Top ring b Oil ring expander c Upper oil ring rail d Lower oil ring rail e 2nd ring И Exhaust side e a 120˚ 120˚ 120˚ b d c И 6. Install: cylinder 1 timing chain guide (exhaust side) 1 NOTE:

_ While compressing the piston rings with one hand, install the cylinder with the other hand. Pass the timing chain and timing chain guide (exhaust side) through the timing chain cav- ity. 4 - 40 CYLINDER AND PISTON ENG Recommended lubricant Engine oil