40
6. CYLINDER AND PISTON
6.1 SERVICE INFORMATION
6.2 TROUBLESHOOTING
6.3 CYLINDER REMOVAL
6.4 PISTON REMOVAL
6.5 PISTON INSTALLATION
6.6 CYLINDER INSTALLATION
6.1 SERVICE INFORMATION
GENERAL
Camshaft lubrication oil is fed to the cylinder head through an oil orifice in the cylinder head
and engine case. Before installing the cylinder head be sure the orifice is not clogged and the
gasket, O-ring and dowel pins are in place.
SPECIFICATION
ITEM
STANDARD
SERVICE
LIMIT
Cylinder I.D.
65-65.01
----------
Taper
----------
0.05
Out of round
----------
0.05
Warp
across
top
----------
0.05
Piston Piston
O.D.
64.96-64.98
----------
Piston pin
Piston pin bore
15.997-16
----------
Piston rings
Piston pin O.D.
14.994-15.000
14.960
Piston-to-pin
clearance
0.004-0.012
----------
Piston
ring
TOP
0.1-0.25
0.5
SECOND
0.3-0.45
0.5
Groove
Clearance
TOP/SEC
0.02-0.06
0.09
Piston ring end gap
OIL
0.2-0.7
1.5
Cylinder-to-piston clearance
0.02-0.05
0.1
Connecting rod small end I.D.
16.01-16.028
----------
TORQUE VALUES
Cylinder head bolts 8~12 n-m (0.8~1.2 kg-m)
Camshaft holder flange nuts 20~24 n-m (2.0~2.4 kg-m)
Tappet adjusting nut 9~12 n-m (0.9~1.2 kg-m)
Summary of Contents for Cobra 220
Page 1: ...AEON MOTOR CO LTD SERVICE MANUAL...
Page 63: ...62...
