Checking The Valve Springs - Yamaha XV1700P Service Manual

VALVES AND VALVE SPRINGS
EAS00241

CHECKING THE VALVE SPRINGS

The following procedure applies to all of the
valve springs.
1. Measure:
• valve spring free length a
Out of specification → Replace the valve
spring.
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.
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ENG
Valve spring free length
Intake valve spring
38.26 mm (1.51 in)
<Limit>: 36.26 mm (1.43 in)
Exhaust valve spring
38.26 mm (1.51 in)
<Limit>: 36.26 mm (1.43 in)
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)
Spring tilt limit
Intake and exhaust inner valve
spring
2.4 mm (0.094 in)
Intake and exhaust outer valve
spring
2.4 mm (0.094 in)