Yamaha VMX12H Supplementary Service Manual page 145

INSPECTION A N D REPAIR
3-21
3. Inspect:
stem end
Mushroom
of stem Replace valve, valve guide, and
oil seal.
4.
Measure:
Valve stem
O u t of specification
M a x i m u m
0.01 mm (0.0004 i n )
Valve Guide
NOTE:
replace valve guide if valve is replaced.
replace oil seal if valve is removed.
1. Inspect:
guide
into cylinder
Remove:
guide
Use t h e Valve Guide Remover
NOTE:
Heat t h e head in an oven to 100°C (212°F) to
ease guide removal a n d installation and to
maintain correct interference fit.
3. Install:
(new)
guide (Oversize)
Use t h e Valve Guide Remover
with t h e Valve Guide Installer
.
01129)
diameter than rest
Replace.
Replace.