Yamaha F4A - Push Rod Guide Inspection; Valve Guide Replacement

E
ROCKER ARM AND VALVES
POWR
1
a
1
2
Push rod guide inspection
1. Inspect:
9Push rod guide
Cracks/Wear/Damage ® Replace.
Valve guide replacement
Replacement steps:
NOTE:
Heat the cylinder head to 200°C (392°F)
in an oven to ease valve guide removal
and installation and also to maintain
correct interference fit.
8 Remove the valve guide with the
valve guide remover and installer.
8 Install the new valve guide specified
position (height) with the valve guide
remover and installer.
8 After installing the valve guide, bore
the valve guide with the valve guide
reamer to obtain the proper valve
stem-to-valve guide clearance.
5-18
Valve guide remover and
installer
11
:
YM-01122/90890-06801
Valve guide height
aa
:
5.9 mm (0.23 in)
Valve stem to valve guide clearance :
Intake: 0.010 ~ 0.037 mm
(0.0004 ~ 0.0015 in)
Exhaust: 0.025 ~ 0.052 mm
(0.0010 ~ 0.0020 in)
Valve guide reamer
22
:
YM-01196/90890-06804