1998-2001 Yamaha YFM600FHM Grizzly Factory Service Manual, Page 160Get this manual
VALVES AND VALVE SPRINGS
VALVE AND VALVE SPRING REMOVAL 1.Check: Valve sealing Inspect the Leakage at the valve seat valve face, valve seat and valve seat widthRefer to "VALVE AND VALVE SPRING INSPECTION"
Checking steps: .Pour clean solvent CD into the intake and exhaust ports Check that the valve seals properlyThere should be no leakage at the valve seat
2.Remove: Valve cotters NOTE: Attach valve spring compressor CD between the valve spring retainer and the cylinder head to remove the valve cottersValve spring compressor: PINYM-04019, 90890-04019 VALVE AND VALVE SPRING INSPECTION 1.Measure: Stem-to-guide clearance Stem-to-guide clearance valve guide inside diameter valve stem diameter (