Yamaha YBR125 Custom, Service Manual, Page: 110 / 218

Assembling and adjustment of engine
ENG
4.Mount:
Lock piece of air valve
Note:
When mounting the air valve lock piece,compress the
spring with compressing tool of air valve spring.
Compressing tool of air valve spring:
90890-04019
5.Beat lock piece of air valve lightly with soft hammer
to fix it on air valve rod.
Note:
Do not boat it forcedly to advoid damaging the air
valve.
Rocker arm and camshaft
1
2.
.Lubricate:
Molybdenum disulfide lubricating oil
(Painting on the confacting face of rocker arm hole and
camshaft )
4
-Stroke engine oil
(Painting to rocker shaft and O-ring)
Mount:
Rocker arm
Rocker shaft
Aim at screw hole of cylinder head to mount,
until the rocker arm can not be seen.
Note:
Be sure to make the mouth part of screw outward to
mount.
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