Camshaft - Yamaha YBR 125 Service Manual

A B
Check and repair
2. Check:
Vertical angel degree of air valve spring
3. Check:
Contacting face of air valve spring
Above2 / 3 of outer circle are not in horizontal conta-
cting state→Replacement

Camshaft

1. Convex part of cam
Corrosive pitting,scratch, blueing
→Replacement
2. Measure:
Convex part A and B of cam
Exceeding specified value range→Replacement
Length of convex part of c
Intake
A Standard: 25.881 25.981 mm
Limitation: 25.851 mm
B Standard: 21.195 21.295 mm
Limitation: 21.165mm
4 - 23
Side angle limitation a :
1.2 mm
ex p
onv
ENG
rt
a of cam