VALVES AND VALVE SPRINGS
5-24
1. Measure:
• Valve-stem-to-valve-guide clearance
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.
• Valve-stem-to-valve-guide clearance =
Valve guide inside diameter “a” -
Valve stem diameter “b”
Valve-stem-to-valve-guide clear-
ance
Valve-stem-to-valve-guide clear-
ance (intake)
0.010–0.037 mm (0.0004–
0.0015 in)
Limit
0.080 mm (0.0032 in)
Valve-stem-to-valve-guide clear-
ance (exhaust)
0.025–0.052 mm (0.0010–
0.0020 in)
Limit
0.100 mm (0.0039 in)
Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keys
email: [email protected]