Checking The Valve Lifters; Installing The Valves - Yamaha YZF-R6(V) 2006 Service Manual

1. Measure:
• Valve spring free length "a"
Out of specification → Replace the valve
spring.
Free length (intake)
37.47 mm (1.48 in)
Limit
35.60 mm (1.40 in)
Free length (exhaust)
37.67 mm (1.48 in)
Limit
35.79 mm (1.42 in)
2. Measure:
• Compressed valve spring force "a"
Out of specification → Replace the valve
spring.
Installed compression spring
force (intake)
166.00–190.00 N (37.32–42.71 lb)
(16.93–19.37 kgf)
Installed compression spring
force (exhaust)
165.00–189.00 N (37.09–42.49 lb)
(16.83–19.27 kgf)
Installed length (intake)
32.80 mm (1.29 in)
Installed length (exhaust)
32.80 mm (1.29 in)
b. Installed length
VALVES AND VALVE SPRINGS
3. Measure:
• Valve spring tilt "a"
Out of specification → Replace the valve
spring.
Spring tilt (intake)
2.5°/1.6 mm
Spring tilt (exhaust)
2.5°/1.6 mm
EAS24320

CHECKING THE VALVE LIFTERS

The following procedure applies to all of the
valve lifters.
1. Check:
• Valve lifter
Damage/scratches → Replace the valve lift-
ers and cylinder head.
EAS24340

INSTALLING THE VALVES

The following procedure applies to all of the
valves and related components.
1. Deburr:
• Valve stem end
(with an oil stone)
2. Lubricate:
• Valve stem "1"
• Valve stem seal "2"
(with the recommended lubricant)
Recommended lubricant
Molybdenum disulfide oil
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