Table Of Contents - Honda V30 Magna VF500C Manual

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HONDA
~
V30 MAGNA
9. CYLI DER HE
/VALVE
SERVICE INFORMATION
9-1
VALVE SEAT INSPECTION/
TROUBLESHOOTING
9-2
REFACING 9-15
CAMSHAFT REMOVAL
9-3
CYLINDER HEAD ASSEMBLY
9-16
CYLINDER HEAD REMOVAL 9-8
CYLINDER HEAD INSTALLATION 9-18
CYLINDER HEAD DISASSEMBLY
9-10
CAMSHAFT INSTALLATION 9-20
VALVE GUIDE REPLACEMENT
9-14
CYLINDER COMPRESSION 9-24
SERVICE INFORMATION
GENERAL
• The cylinder heads can be serviced with the engine in the frame.
CD
If the cam sprockets of either the front or rear cylinder are removed, the valve timing of both cylinder must be checked
during reinstallation.
• Camshaft lubricating oil is fed through the external oil lines. Be sure the oil lines are not clogged.
• During assembly, apply molygdenum disulfide to the camshaft holder surfaces to provide initial lubrication.
III
The cylinder numbering is given below:
FRONT
-
SPECI F ICATIONS
STANDARD SERVICE LIMIT
Compression pressure
1200 ± 200
kPa
(12
±
2
kg/cm
2
,
170
±
28
psi)
-
Camshaft Cam height IN
35.22-35.38
mm
(1.387-1.393
in) 35.18
mm
(1.385
in)
EX
35.12-35.28
mm
(1.383-1.389
in)
35.08 mm (1.381 in)
Runout
- 0.05
mm
(0.002
in)
Oil Both sides Inside
0.110-0.190
mm
(0.0043-0.0075
in)
0.194
mm
(0.0076
in)
clearance tightened
Outside
0.060-0.126
mm
(0.0024-0.0050
in)
0.130
mm
(0.0051
in)
One side tightened
0.045-0.106
mm
(0.0018-0.0042
in)
0.110
mm
(0.0043
in)
Rocker arm Rocker arm 1.0.
12.000-12.018
mm
(0.4724-0.4731
in)
12.05
mm
(0.474
in)
Shaft 0.0.
11.966-11.984 mm (0.4711-0.4718 in) 11.93 mm (0.470 in)
Valve Valve stem 0.0.
IN 4.975-4.990
mm
(0.1959-0.1965
in)
4.97
mm
(0.196
in)
EX
4.955-4.970
mm
(0.1951-0.1957
in)
4.94
mm
(0.195
in)
Valve guide 1.0.
IN/EX
5.000-5.012 mm (0.1969-0.1973 in) 5.04 mm (0.198 in)
Stem-to-gu ide clearance IN 0.010-0.037 mm (0.0004-0.0015 in) 0.07 mm (0.003 in)
EX
0.030-0.057
mm
(0.0012-0.0022
in)
0.10
mm
(0.004
in)
Valve seat width
0.90-1.10
mm
(0.035-0.043
in)
1.5
mm
(0.06
in)
Valve spring Free length Inner
32.35
mm
(1.274
in) 30.65 mm (1.207 in)
Outer
35.66
mm
(1.404
in)
34.36
mm
(1.353
in)
Cylinder head Warpage -
0.10 mm (0.004 in)
Date of Issue: July,
1984
©
HONDA MOTOR CO., LTD.
9-1