DAELIM Roadwin 250R FI VJF125, Service Manual

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11-1
11. CYLINDER / PISTON
SERVICE INFORMATION
GENERAL SAFETY
Be careful not to damage the mating surfaces by using a screwdriver when disassembling the cylinder. Do not strike the
cylinder too hard during disassembly, even with a rubber or plastic mallet, to prevent the possibility of damage to the
cylinder fins.
Take care not to damage the cylinder wall and piston.
SPECIFICATIONS
TROUBLESHOOTING
Compression too low Overheating
Worn piston Excessive carbon build-up on top of piston
Worn, damaged piston ring
Worn cylinder
Abnormal noise
Excessive smoke
Worn cylinder and piston
Worn cylinder, piston or piston rings Worn connecting rod small end bearing or piston pin
Improper installation of piston ring Damaged piston ring
Scored or scratched piston or cylinder Excessive carbon build-up on top of piston
SERVICE INFORMATION · ·· ·· · 11-1
TROUBLESHOOTING
· ·· ·· ·· ·
11-1
CYLINDER REMOVAL
· ·· ·· ·· ·
11-2
PISTON / PISTON RING
· ·· ·
11-3
CYLINDER INSTALLATION
· ·
11-6
ITEM STANDARD VALUE SERVICE LIMIT
Unit : mm
73.10
0.10
0.05
0.10
72.60
17.04
16.96
0.02
0.09
0.09
0.50
1.10
0.30
17.06
0.04
73.005~73.015
-
-
-
72.985~72.965
17.002~17.008
16.994~17.000
0.002~0.014
0.015~0.045
0.015~0.045
0.35~0.45
0.20~0.70
0.020~0.050
17.010~17.028
0.010~0.034
INNER DIAMETER
CYLINDERICAL
ROUNDLESS
HEAD CONTACT WARPAGE
PISTON SKIRT OUTER DIAMETER
PISTON PIN HOLE INNER DIAMETER
PISTON PIN OUTER DIAMETER
PISTON-TO-PISTON PIN CLEARANCE
CYLINDER
PISTON RING-TO-
GROOVE CLEARANCE
PISTON RING
JOINT GAP
TOP
SECOND
TOP / SECOND
OIL RING (SIDE RAIL)
PISTON,
PISTON PIN,
PISTON RING
CYLINDER-TO-PISTON CLEARANCE
CONNECTING ROD SMALL END INNER DIAMETER
GAP BETWEEN CONNECTING ROD SMALL END AND PISTON PIN