2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 168Get this manual

2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 168

Quality of the image is intentionally reduced!

VALVES AND VALVE SPRINGS
REMOVING THE VALVE AND VALVE SPRING 1.Check: Valve sealing Leakage at the valve seat Inspect the valve face, valve seat and valve seat widthRefer to "CHECKING THE VALVE