Yamaha FZ-16 2015 Service Manual page 155

4.
Grind:
• Valve face
• Valve Seat
NOTE:
After replacing the head or replace the valve
and the valve guide, should be lapped the valve
seat and valve face
a.
Apply lapping compound secondary
"A" to the valve face.
CAUTION
Do not let enter the lapping compound between
the valve stem and valve guide.
b. Apply molybdenum disulfide oil to the valve
stem.
c. Install the valve in the cylinder
head
d.
Turn the valve until the valve face and valve
guide seats are uniformly bright, clean after all
the lapping compound.
NOTE:
For best lapping results, lightly tap the valve seat
while
turn the valve back and forth between his
hands.
VÁLVULAS Y RESORTES DE VÁLVULAS
e.
Apply a fine lapping compound to the valve
face and repeat the above steps.
f. After every lapping procedure, be sure to clean
all of the mixture to
lapping the face of the valve and valve seat.
g.
Install the valve in the cylinder head.
h.
Pressing the valve through the end of the
valve guide and the valve seat to make a
clear print.
i. Measure the width of the valve seat "c" again.
If the width of the valve seat out of
specification, and correct it again lapping the
valve seat.
CHECKING THE VALVE SPRINGS The following
procedure applies to all valve springs.
1.
Measure:
•
Free length of valve spring "to" Out of
Specification Replace ‫ וי‬the
valve spring.
5-18