Checking The Valve Springs - Yamaha FJR1300N 2001 Service Manual

VALVES AND VALVE SPRINGS
c. Install the valve into the cylinder head.
d. Turn the valve until the valve face and valve
NOTE:
@
For the best lapping results, lightly tap the
valve seat while rotating the valve back and
forth between your hands.
e. Apply a fine lapping compound to the valve
f. After every lapping procedure, be sure to
g. Apply Mechanic's blueing dye (Dykem) b
h. Install the valve into the cylinder head.
i. Press the valve through the valve guide and
j. Measure the valve seat width c again. If
EAS00241

CHECKING THE VALVE SPRINGS

The following procedure applies to all of the
valve springs.
1. Measure:
5 - 30
seat are evenly polished, then clean off all
of the lapping compound.
face and repeat the above steps.
clean off all of the lapping compound from
the valve face and valve seat.
onto the valve face.
onto the valve seat to make a clear impres-
sion.
the valve seat width is out of specification,
reface and lap the valve seat.
• valve spring free length a
Out of specification → Replace the valve
spring.
Valve spring free length (intake
and exhaust)
39.7 mm
<Limit> : 37.7 mm
ENG