Checking The Valve Springs - Yamaha XJR1300(L) 99 Service Manual

VALVES AND VALVE SPRINGS
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 be-
tween your hand.
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 the
EAS00241

CHECKING THE VALVE SPRINGS

The following procedure applies to all of the
valve springs.
1. Measure:
S valve spring free length a
4-23
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.
valve seat width is out of specification, reface
and lap the valve seat.
Out of specification ! Replace the valve
spring.
ENG