2006-2008 Yamaha RS, Vector, Rage Factory Service Manual, Page 234Get this manual

2006-2008 Yamaha RS, Vector, Rage Factory Service Manual, Page 234

VALVES AND VALVE SPRINGS 9Measure: Valve seat width Out of specification Replace the cylinder headValve seat width: Intake:
through the valve guide and onto the valve seat to make clear impression Measure the valve seat width Where the valve seat
and valve face contacted one another, the blueing will have been removed 10Lap: Valve face Valve seat After replacing the
cylinder head or replacing the valve and valve guide, the valve seat and valve face should be lappedLapping steps: Apply