Suzuki RM-z450 Owner's Service Manual page 98

6-13 CYLINDER HEAD, CYLINDER AND PISTON
VALVE STEM WEAR
• If the valve stem is worn down to the limit, as measured with a
micrometer, replace the valve.
• If the stem is within the limit, then replace the guide.
• After replacing valve or guide, be sure to recheck the deflec-
tion.
" Valve stem O.D.:
Standard (IN.) : 5.475 – 5.490 mm (0.2156 – 0.2161 in)
(EX.): 5.455 – 5.470 mm (0.2148 – 0.2154 in)
# 09900-20205: Micrometer (0 – 25 mm)
NOTE:
If valve guides have to be removed for replacement after
inspecting related parts, carry out the steps shown in valve
guide servicing.
VALVE GUIDE SERVICING
• Using the valve guide remover, drive the valve guide out
toward the intake or exhaust camshaft side.
# 09916-44910: Valve guide remover/installer
NOTE:
* Discard the removed valve guide subassemblies.
* Only oversized valve guides are available as replacement
parts. (Part No. 11115-45G70)
• Re-finish the valve guide holes in cylinder head with the
reamer and handle.
When refinishing or removing the reamer from the
valve guide hole, always turn it clockwise.
# 09916-34580: Valve guide reamer (10.8 mm)
09916-34542: Reamer handle
CAUTION