Suzuki drz 400 2000 - Page 65

3-24 ENGINE
VALVE HEAD RADIAL RUNOUT
Support the valve using a V-block and measure the valve head
radial runout using the dial gauge, as shown.
If the runout ex-
ceeds the service limit, replace the valve with a new one.
aib 09900-20606: Dial gauge (1/100 mm)
09900-20701 : Magnetic stand
09900-21304: V- block set (100 mm)
~ Valve heatl ratllal runout
Service Limit : 0.03 mm (0. 001 in)
VALVE FACE WEAR
Visually inspect ea ch valve face for wear or damage. If any ab-
normal wear is found, replace the respective valve with a new
one. Measure the valve face thickness
Cll. If the valve face thick-
ness is not within the specified value, replace the valve with a
new one.
aib 09900-20101 : Vernier calipers
~ Valvo faco thickness CD
Service Limit : 0.5 mm (0.02 in)
VALVE STEM DEFLECTION
Lift the valve about 10 mm (0.39 in) from the valve seat. Mea-
sure the valve stem de flection in two directions, "X" and "Y ", per-
pendicular to each other. Position the dial gauge as shown. If the
deflec
ti on exceeds the service limit, determine whether the valve
or the guide should be replaced with a new one.
aib 09900-20606: Dial gauge (1/100 mm)
09900-20701 : Magnetic stand
g Valve stem deflection
Service Limit : 0.35 mm (0.014 in)
VALVE STEM WEAR
Measure the valve stem outside diamet er using the micrometer.
If the outside diameter is not within the specified va lue, replace
the valve with a new one.
If the valve stem outside diameter is
within specification, but the valve stem
de flection is not, replace
the valve guide with a new one. After replacing the valve
or valve
guide, check the deflection.
r5ib 09900-20205 : Microm .. t .. r (0 - 25 mm)
g Valve stem 0 .0.
Standard :
IN: 4.975 - 4.990 mm (0.1959 - 0.1965 in)
EX: 4.955 - 4.970 mm (0.1951 - 0.1957 in)
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