Checking The Valve Springs; Installing The Valves - Yamaha YBR125ED 2005 Service Manual

VALVES AND VALVE SPRINGS
EAS00241

CHECKING THE VALVE SPRINGS

The following procedure applies to all of the
valve springs.
1. Measure:
2. Measure:
b Installed length
3. Measure:
EAS00245

INSTALLING THE VALVES

The following procedure applies to all of the
valves and related components.
1. Deburr:
5 - 27
• valve spring free length a
Out of specification → Replace the valve
spring.
Valve spring free length
47.06 mm (1.85 in)
<Limit>: 44.71 mm (1.76 in)
• compressed valve spring force a
Out of specification → Replace the valve
spring.
Compressed valve spring force
(installed)
160.0 ~ 184.0 N at 25.6 mm
(16.32 ~ 18.76 kg at 25.6 mm,
35.97 ~ 41.36 lb at 1.01 in)
• valve spring tilt a
Out of specification → Replace the valve
spring.
Spring tilt limit
2.5°/2.1 mm (2.5°/0.08 in)
• valve stem end
(with an oil stone)
ENG