2001 Yamaha YFM660 Raptor Factory Service Manual, Page 207Get this manual

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VALVES AND VALVE SPRINGS
4.Measure: Margin thickness Out of specification ReplaceMargin thickness: Intake: 0.851.15 mm (0.03350.0453 in) Exhaust: 0.851.15 mm (0.03350.0453 in)

5.Mea

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