2009 Yamaha Grizzly Service Manual, Page 220Get this manual

2009 Yamaha Grizzly Service Manual, Page 220

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VALVES AND VALVE SPRINGS Free length (intake) 40.38 mm (1.59 in) Limit 38.36 mm (1.51 in) Free length (exhaust) 40.38 mm (1.59 in) Limit 38.36 mm (1.51 in) Spring tilt (intake) 2.51.80 mm Spring tilt