2006-2008 Yamaha RS, Vector, Rage Factory Service Manual, Page 235Get this manual

2006-2008 Yamaha RS, Vector, Rage Factory Service Manual, Page 235

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VALVES AND VALVE SPRINGS
11 Measure: Valve spring free length Out of specification Replace the valve springValve spring free length (intake and exhaust): 39.73 mm (1.56 in) Limit: 37.7 mm (1.48