Checking The Valve Springs - Yamaha FZ6RC Service Manual

sion.
j. Measure the valve seat width "c" again. If the
valve seat width is out of specification, reface
and lap the valve seat.
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EAS24310

CHECKING THE VALVE SPRINGS

The following procedure applies to all of the
valve springs.
1. Measure:
Valve spring free length "a"
G
Out of specification → Replace the valve
spring.
Free length (intake)
39.08 mm (1.54 in)
Limit
37.13 mm (1.46 in)
Free length (exhaust)
39.08 mm (1.54 in)
Limit
37.13 mm (1.46 in)
2. Measure:
Compressed valve spring force "a"
G
Out of specification → Replace the valve
spring.
VALVES AND VALVE SPRINGS
b. Installed length
Installed
force (intake)
132.40–152.40 N (13.50–15.54
kgf, 29.76–34.26 lbf)
Installed
force (exhaust)
132.40–152.40 N (13.50–15.54
kgf, 29.76–34.26 lbf)
Installed length (intake)
33.40 mm (1.31 in)
Installed length (exhaust)
33.40 mm (1.31 in)
3. Measure:
Valve spring tilt "a"
G
Out of specification → Replace the valve
spring.
Spring tilt (intake)
2.5 ° ° ° ° /1.7 mm (0.07 in)
Spring tilt (exhaust)
2.5 ° ° ° ° /1.7 mm (0.07 in)
5-25
compression spring
compression spring