Honda CR125R 1992 Service Manual page 80

Cylinder Head/Cylinder/Piston
Torque Values
Cylinder head nut
Cylinder mounting nut
Cylinder stud
Engine hanger bracket bolt
H.P.P. valve cover bolt
H.P.P. valve cover screw
Cylinder upper cover bolt
H.P.P. valve guide bolt
H.P.P. pinion holder socket bolt
Troubleshooting
27 N•m (2.7 kg-m, 20 ft-lb)
27 N•m (2.7 kg-m, 20 ft-lb)
12 N•m ( 1. 2 kg -m, 9 ft-lb) Apply a locking agent
27 N·m (2.7 kg -m, 20 ft-lb)
12 N•m ( 1 .2 kg-m, 9 ft-lb)
2.5 N·m (0.25 kg-m , 1.8 ft-lb)
12 N•m (1.2 kg -m, 9 ft-lb)
9 N•m (0.9 kg-m, 6.5 ft-lb)
5.5 N•m (0. 55 kg-m, 4.0 ft-lb)
Compression Too Low, Hard Starting Or Poor Performance
At Low Speed
Abnormal Noise- Piston
Worn or cracked piston
Blown cylinder head gasket
• Loose spark plug
Worn, stuck or broken piston ring
Worn or damaged cylinder and piston
Faulty reed valve
Worn crankshaft seals
Compression Too High, Overheating Or Knocking
• Excessive carbon build-up in combustion chamber or on
top of piston
• Worn cylinder and piston
• Worn piston pin or piston pin hole
Worn connecting rod small end bearing
Abnormal Noise- Piston Ring
Worn, stuck or broken piston ring
• Worn o r damaged cylinder
Contaminated Coolant
• Leaking cylinder head gasket
7-2
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