CF MOTO CF125T-19 2003, Service Manual

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8-2
CFMOTO
Tightening torque
Cylinder cover bolt 10N · m(1.0kgf · m)
Cylinder head nut 35N · m(3.5kgf · m)
Timing chain bolt 9N · m(0.9kgf · m)
Tensioner spring bolt 10N · m(1.0kgf · m)
Cylinder head bolt 10N · m(1.0kgf · m)
Tensioner bolt 10N · m(1.0kgf · m)
Cylinder body cover bolt 10N · m(1.0kgf · m)
Troubleshooting
Poor sealing around cylinder cover can be examined by measuring the cylinder compression pressure or
judging the noise from the sealing part of cylinder cover.
In case of poor starting or unsteady low-speed running, check if there is smoke from ventilation pipe of
crankcase. If there is smoke, it is because the piston rings are worn, broken or jammed.
Unstable idle speed Abnormal noise
Low compression pressure Damage or wear with Cam surface of camshaft comp.
Air Leakage at carburetor joint Improper adjustment of valve clearance
Bad fuel supply of fuel system Burned valve or damaged valve spring
Lower compression pressure Damaged rocker arm or rocker arm shaft
Improper adjustment of valve clearance Improper action of chain
Chain is elongated
Valve burnt or worn tensioner.
Improper valve timing
Poor strength of valve spring
Poor sealing of valve seat
Air leakage of cylinder head seal washer
Distortion or cracks of cylinder head
Improper installation of spark plug
Over-high compression pressure
Carbon deposit on piston or in combustion chamber
Blue smoke in muffler
Valve guide or valve stem is worn
Damaged or worn seal ring of valve stem