Piston And Piston Ring - HYOSUNG TE 450 Service Manual

3-29 ENGINE
▣ ▣ CAM CHAIN AND CAM CHAIN GUIDE
Check the cam chain for wear, damage and kinked
or binding 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 AND PISTON RING

▣ ▣ PISTON DIAMETER INSPECTION
Measure the outside diameter of piston in the direc-
tion perpendicular 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
Micrometer(75~100 mm) : 09900-20204
▣ ▣ PISTON-TO-CYLINDER CLEARANCE
To determine the piston-to-cylinder clearance, calcu-
late the difference between the cylinder bore and out-
side diameter of the piston.
Standard
Piston-to-cylinder
0.050~0.060 mm
clearance
(0.0020~0.0024 in)
▣ ▣ PISTON PIN HOLE BORE
Using a dial calipers, measure the piston pin hole
bore both the vertical and horizontal directions.
If the measurement exceeds the service limit, replace
the piston with a new one.
Piston pin hole bore
Dial calipers : 09900-20605
Service limit
95.88 mm
(3.7748 in)
Service limit
0.120 mm
(0.0048 in)
Service limit
19.030 mm (0.7492 in)
18mm (0.71in)