Yamaha FJR1300R Service Manual page 335

VALVES AND VALVE SPRINGS
1. Measure:
• valve-stem-to-valve-guide clearance
Valve-stem-to-valve-guide clearance =
Valve guide inside diameter a –
Valve stem diameter b
Out of specification → Replace the valve
guide.
2. Replace:
• valve guide
NOTE:
@
To ease valve guide removal and installation,
and to maintain the correct fit, heat the cylinder
head to 100 °C (212 °F) in an oven.
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a. Remove the valve guide with the valve
guide remover 1.
b. Install the new valve guide with the valve
guide installer 2 and valve guide remover
1.
c. After installing the valve guide, bore the
valve guide with the valve guide reamer 3
to obtain the proper valve-stem-to-valve-
guide clearance.
NOTE:
@
After replacing the valve guide, reface the
valve seat.
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5 - 26
ENG
Valve-stem-to-valve-guide clear-
ance
Intake
0.010 ~ 0.037 mm
(0.0004 ~ 0.0015 in)
<Limit>: 0.08 mm (0.0031 in)
Exhaust
0.025 ~ 0.052 mm
(0.0010 ~ 0.0020 in)
<Limit>: 0.1 mm (0.004 in)
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Valve guide remover (ø5)
YM-04097
Valve guide installer (ø5)
YM-04098
Valve guide reamer (ø5)
YM-04099
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