Sachs Bikes MadAss Reparaturanleitung Seite 85

CYLINDER HEAD / VALVES
TROUBLESHOOTING
Engine top-end problem are usually performance-related and can be diagnosed by a compression test. Engine noises can usually
be traced to the top-end with a sounding rod or stethoscope.
Uneven compression or low compression
- Valve troubles
Incorrect valve adjustment
Burnt or bent valves
Incorrect valve timing
Broken valve spring
Worn or damaged valve seat
- Cylinder head
Leaking or damaged head gasket
Warped or cracked cylinder head
- Faulty cylinder or piston
High compression
- Excessive carbon build-up on piston or combustion chamber
Excessive noise
- Incorrect valve adjustment
- Sticking valve or broken or weak valve spring
- Damaged or worn rocker arm or rocker arm shaft
- Damaged camshaft bearing
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