Cylinder Head/Valves Torque Values; Cylinder Head/Valves - Tools; Cylinder Head/Valves Troubleshooting - Honda 1985 CBX750F Workshop Manual

HONDA
CBX750F
CYLINDER HEADNALVES
TORQUE VALUES
Camshaft holder
12-16 N·m (1.2-1.6 kg-m, 9-12 tt-tb)
Cam sprocket
18-20 N·m (1.8-2.0 kg-m, 13-14 ft-lbl
Cylinder head 26-30 N·m (2.6-3.0 kq-rn, 19-22 ft-lbl
Spark plug
12-18 N·m (1.2-1.8 kg-m, 9-13 ft-Ib)
Oil bolt 7mm
10-14 N·m (1.0-1.4 kg-m, 7-10ft-lb)
8mm
12-16 N·m (1.2-1.6 kg-m, 9-12 ft-Ib)
10mm
23-27 N·m (2 .3-2.7 kg-m, 17-20ft-lb)
TOOLS
Special
Valve guide reamer
07984-MA60000
Valve guide driver
07942-MA60000
Hydraulic tappet bleeder
07973-ME90000
Common
Valve spring compressor
07757-0010000
Valve seat cutter
Valve seat cutter, 24.5 mm (EX 45°) 07780-0010100
Valve seat cutter, 27.5 mm (IN 45°) 07780-0010200
Valve seat cutter, 25 mm (EX 32°)
07780-0012000
Valve seat cutter, 28 mm (IN 32°) 07780-0012100
Valve seat cutter, 22 .mm (EX 60
0
)
01780-0014202 ..
Valve seat cutter, 26 mm (IN 60
0
)
07780-,0014500
Valve seat cutter holder, 5 mm
07781-0010400
TROUBLESHOOTING
Engine top-end problems are usually performance-related and can be diagnosed by a compression test, or are 'engine noises
which can be traced to the top-end with a sounding rod or stethoscope. .
Low compression or uneven compression
1. Valves.
Faulty hydraulic tappet.
Burned or bent valves.
Incorrect valve timing.
Broken valve spring.
2. Cylinder head.
- Leaking or damaged head gasket.
- Warped or cracked cylinder head.
3. Cylinder and piston (Refer to Section 7).
Compression too high
1. Excessive carbon build-up on piston head or combustion chamber.
Excessive noise
1. Faulty hydraulic valve tappet system.
Low engine oil level.
Contaminated oil.
Low oil pressure.
Damaged hydraulic tappet.
2. Sticking valve or broken valve spring.
3. Damaged or worn camshaft.
4. Loose or worn cam chain .
5. Worn or damaged cam chain tensioner.
6. Worn cam sprocket teeth.
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