Yamaha YW125Y_ Utility Trailer User Manual


 
ENG
5-29
a
EAS00241
CHECKING THE VALVE SPRINGS
The following procedure applies to all of the valve
springs.
1. Measure:
8valve spring free length a
Out of specification J Replace the valve
spring.
Valve spring free length
41.88mm (1.649in)
<Limit>: 39.786mm (1.566in)
VALVES AND VALVE SPRINGS
2. Measure:
8compressed valve spring force a
Out of specification J Replace the valve
spring.
b Installed length
Compressed valve spring force (in-
stalled)
137 ~ 157N/mm (13.97 ~ 16.01kgf/
mm, 30.83 ~ 35.33lbf/in) at 30mm
(1.18in)
3. Measure:
8valve spring tilt a
Out of specification J Replace the valve
spring.
Spring tilt limit
2.5°/1.8mm (2.5°/0.07in)
a
a
b
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