Yamaha F6AMH, Service Manual

Page: 270 / 510

CAMSHAFT AND VALVES
REMOVING THE VALVE
Remove:
Valve spring lock 1
Valve spring retainer
2
Valve spring 3
Valve spring seat
4
Intake valve or exhaust valve 5
NOTE:
Set the attachment on to the center of the
spring retainer.
Do not overtighten the valve spring
compressor.
CHECKING THE VALVE AND VALVE
GUIDE
1. Measure:
Valve guide inside diameter
a
Out of specification Replace.
2. Measure:
Valve seat width
b
Out of specification Replace.
3. Measure:
Valve margin thickness
c
Out of specification Replace.
Valve spring compressor:
YM-01253/90890-04019
Attachment:
YM-04018/90890-04018
Valve guide inside diameter
a
(intake guide and exhaust guide):
5.500 - 5.512 mm
( 0.2165 - 0.2170 in)
Valve seat width
b
(intake valve and exhaust valve):
0.6 - 0.8 mm (0.023 - 0.031 in)
Valve margin thickness
c
(intake valve and exhaust valve):
0.7 mm (0.027 in)
5-45