Suzuki LT-Z250 - Page 69

ENGINE 3-27
VALVE STEM WEAR
Measure the valve stem outside diameter with the micrometer. If
the outside diameter is not within the specified value, replace
the valve with a new one. If the valve stem outside diameter is
within specification, but the valve stem deflection is not, replace
the valve guide with a new one. After replacing the valve or
valve guide, check the deflection and.
% Valve stem O.D.
Standard (IN) : 5.475  5.4 90 mm (0.2156  0.2 161 in)
(EX) : 5.455  5.4 70 mm (0.2148  0.2 154 in)
& 09900-20205: Micrometer (0  25 mm)
VALVE GUIDE SERVICING
 Drive the valve guide out toward the intake or exhaust rocker
arm side with the valve guide remover.
& 09916-44910: Valve guide remover/installer
NOTE:
* Discard the removed valve guide.
* Only oversized valve guides are available as replacement
parts. (Part No. 11115-05270)
 Re-finish the valve guide holes in the cylinder head with the
valve guide reamer and handle.
& 09916-34561: Valve guide reamer (11.3 mm)
09916-34542: Reamer handle
 Install a ring onto each valve guide. Be sure to use new rings.
 Oil the stem hole of each valve guide and drive the guide into
the guide hole with the valve guide installer.
& 09916-44910: Valve guide remover/installer
'
Failure to oil the valve guide hole before driving the
new guide into place may result in a damaged guide or
head.
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877-999-5686