Installing The Valves - Yamaha XV16AL Service Manual

5
VALVES AND VALVE SPRINGS
2. Measure:
• compressed valve spring force a
Out of specification → Replace the valve
spring.
b Installed length
3. Measure:
• valve spring tilt a
Out of specification → Replace the valve
spring.
EAS00246

INSTALLING THE VALVES

The following procedure applies to all of
the valves and related components.
1. Deburr:
• valve stem end
(with an oil stone)
5 - 51
ENG
Compressed valve spring force
(installed)
Intake and exhaust inner valve
spring
6.3 ~ 7.3 kg at 29.0 mm
(13.9 ~ 16.1 lb at 1.14 in)
Intake and exhaust outer valve
spring
13.9 ~ 16.1 kg at 31.0 mm
(30.6 ~ 35.5 lb at 1.22 in)
Maximum valve spring tilt
Intake and exhaust inner valve
spring
2.4 mm (0.094 in)
Intake and exhaust outer valve
spring
2.4 mm (0.094 in)