Suzuki GSX-R600 Manual page 283

Valve Stem and Valve Face Wear Condition
• Visually inspect each valve stem and valve face for
wear and pitting. If it is worn or damaged, replace the
valve with a new one.
Valve Stem Deflection
Lift the valve about 10 mm (0.39 in) from the valve seat.
Measure the valve stem deflection in two directions, "X"
and "Y", perpendicular to each other. Position the dial
gauge as shown. If the deflection exceeds the service
limit, then determine whether the valve or the guide
should be replaced with a new one.
Special tool
(A): 09900–20607 (Dial gauge (1/100 mm, 10
mm))
(B): 09900–20701 (Magnetic stand)
Valve stem deflection (IN. & EX.)
Service limit: 0.25 mm (0.010 in)
Valve Stem Wear
Measure the valve stem O.D. using the micrometer. If it
is out of specification, replace the valve with a new one.
If the valve stem O.D. is within specification but the valve
stem deflection is not, replace the valve guide. After
replacing the valve or valve guide, recheck the
deflection.
Special tool
(A): 09900–20205 (Micrometer (0 – 25 mm))
Valve stem O.D.
Standard (IN.): 4.475 – 4.490 mm (0.1762 – 0.1768 in)
Standard (EX.): 4.455 – 4.470 mm (0.1754 – 0.1760 in)
NOTE
If valve guides have to be removed for
I837H1140060-01 replacement after inspecting related parts,
carry out the steps shown in valve guide
replacement. Refer to "Valve Guide
Replacement (Page 1D-45)".
(A)
(B)
I837H1140061-03
Engine Mechanical:
(A)
I718H1140122-01
1D-43