HYOSUNG 2010 ST7 Service Manual page 74

3-27 ENGINE
CAM CHAIN TENSIONER
ADJUSTER
Check that the push rod slides smoothly with the lock
shaft handle clockwise.
If it does not slide smoothly, replace the cam chain
tensioner adjuster with a new one.
CAM CHAIN TENSIONER
Check the contacting surface of the cam chain tensioner.
If it is worn or damaged, replace it with a new one.
CAM CHAIN AND CAM
CHAIN GUIDE
Check the cam chain for wear, damage and kinked or bind-
ing links. If any defects are found, replace it with a new
one.
Check the cam chain guide for wear and damage. If it
is found to be damaged, replace it with a new one.
PISTON DIAMETER INSPEC-
TION
Measure the outside diameter of piston in the direction per-
pendicular to the piston pin axis at the height from the skirt
as shown in the illustration using a micrometer.
If the measurement is found less than the service limit,
replace the piston.
Piston diameter
Piston oversize
Micrometer(75~100 mm) : 09900-20204
Service limit
81.380 mm
(3.2039 in)
0.5, 1.0 mm (0.02, 0.04 in)
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