2010-2011 Yamaha RS Vector / RS Venture Service Manual, Page 263Get this manual

2010-2011 Yamaha RS Vector / RS Venture Service Manual, Page 263

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VALVES AND VALVE SPRINGS 10.Lap: Valve face Valve seat
TIP After replacing the cylinder head or replacing the valves and valve guides, the valve seat and valve face should be lappedLapping steps