2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 169Get this manual

2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 169

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VALVES AND VALVE SPRINGS

2.Replace: Valve guide Replacement steps: NOTE: To ease guide removal, installation and to maintain correct fit, heat the cylinder head to 100 (212 F) in an oven