HYOSUNG Aquil GV650, Service Manual

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3-25 ENGINE
◉ CAM CHAIN TENSIONER
ADJUSTER
Check that the push rod slides smoothly with the lock
shaft handle
① clockwise.
If it does not slide smoothly, replace the cam chain
tensioner adjuster with a new one.
Piston oversize 0.5, 1.0 mm (0.02, 0.04 in)
Piston diameter
Service limit
81.380 mm
(3.2039 in)
◉
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.
Micrometer(75~100 mm) : 09900-20204
◉
PISTON DIAMETER INSPECTION
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.
①
20mm (0.79in)