Suzuki VZR1800 2007 Service Manual page 92

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, perpen-
dicular to each other, by positioning the dial gauge as shown.
• If the deflection measured exceeds the limit, then determine
whether the valve or the guide should be replaced with a new
one.
$ Valve stem deflection (IN. & EX.):
Service Limit: 0.35 mm (0.014 in)
% 09900-20607: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
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.) : 5.975 – 5.990 mm (0.2352 – 0.2358 in)
(EX.): 5.955 – 5.970 mm (0.2344 – 0.2350 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. (!3-36)
ENGINE 3-35