Honda 88-91 NT650 HAWK GT Serviceanleitung Seite 104

9. CYLINDER HEAD/VALVES
SERVICE INFORMATION
TROUBLESHOOTING
CYLINDER HEAD COVER REMOVAL
CAMSHAFT REMOVAL
CYLINDER HEADS
VALVE GUIDE REPLACEMENT
SERVICE INFORMATION
GENERAL
9-1
9-2
9-3
9-3
9-7
9-11
VALVE SEAT INSPECTION/REFACING
CYLINDER HEAD ASSEMBLY
CYLINDER HEAD INSTALLATION
CAMSHAFT INSTALLATION
CYLINDER HEAD COVER
INSTALLATION
9-12
9-14
9-15
9-17
9-20
• The cylinder heads can be removed without removing the engine.
• Camshaft lubricating oil is fed through an oil pass pipe. Be sure the holes in the oil pass bolts are not clogged.
• During assembly apply MOS2 paste grease to the camshaft holders, camshaft journals of the cylinder head, rocker arm
shafts, rocker arm slipper faces and valve stems to provide initial lubrication.
SPECIFICATIONS
Unit: mm (in) •
ITEM STANDARD SERVICE LIMIT
Compression pressure
1,324
±
196
kPa
- -
(13.5
±
2.0 kg/cm
2 ,
192
±
28 psi)
Camshaft Cam lobe height IN
38.189 (1.5035) 38.17 (1.503)
EX
38.213 (1.5044) 38.19 (1.504)
Journal 0.0.
21.959-21.980 (0.8645-0.8654) 21.95 (0.864)
Runout 0.030 (0.0012)
0.05 (0.002)
Oil clearance
0.040-0.093 (0.0015-0.0037) 0.11 (0.004)
Rocker arm Rocker arm I. D.
IN/EX
12.000-12.018 (0.4724-0.4731)
12.03 (0.474)
Rocker arm shaft
IN/EX 11.966-11.984 (0.4711-0.4718)
11.96 (0.471)
0.0.
Valve and
Valve stem 0.0. IN
5.475- 5.490 (0.2156-0.2161) 5.47 (0.215)
valve guide
EX 6.555-6.570 (0.2580-0.2587) 6.55 (0.258)
Valve guide 1.0. IN
5.500-5.512 (0.2165-0.2170) 5.53 (0.218)
EX 6.600-6.615 (0.2598-0.2604) 6.66 (0.262)
Stem-to-guide IN
0.010-0.037 (0.0004-0.0015) 0.07 (0.003)
clearance
EX
0.030-0.060 (0.0014-0.0024) 0.11 (0.004)
Valve seat width 0.9-1.1 (0.035-0.043) 1.5 (0.06)
Valve guide pro- IN
19.4-19.6 (0.76-0.77)
- -
jection height
EX 17.9-18.1 (0.70-0.71)
- -
Valve spring Free length OUTER IN 42.14 (1.659) 40.58 (1.598)
EX
42.83 (1.686) 41.25 (1.624)
INNER IN
38.11 (1.500) 36.47 (1.436)
EX 38.81 (1.765) 37.51 (1.477)
Cylinder head warpage
- -
0.10 (0.004)
9-1