Checking The Valve Seats - Yamaha XV1700PCRC Service Manual

VALVES AND VALVE SPRINGS
5. Measure:
• valve margin thickness a
Out of specification → Replace the valve.
6. Measure:
• valve stem runout
Out of specification → Replace the valve.
NOTE:
_
• When installing a new valve, always replace
the valve guide.
• If the valve is removed or replaced, always
replace the oil seal.
EAS00240

CHECKING THE VALVE SEATS

The following procedure applies to all of the
valves and valve seats.
1. Eliminate:
• carbon deposits
(from the valve face and valve seat)
2. Check:
• valve seat
Pitting/wear → Replace the cylinder head.
5 - 43
ENG
Valve margin thickness
0.7 ~ 1.3 mm (0.0276 ~ 0.0512 in)
Valve stem runout
0.01 mm (0.0004 in)