Honda SXS700M4 Service Manual page 202

CYLINDER HEADNALVE/CAMSHAFT
TROUBLESHOOTING
Engine top-end problems usually affect engine performance. These can be diagnosed
by
a compression test, or by tracing top-
end noise with a sounding rod or stethoscope.
If the performance is poor at low speeds, check for a whil e smoke in the crankcase breather hose. If the hose is smoky , check
for seized piston ring (page 11-3).
Compression too low, hard starting or poor performance at low speed
Valves:
- Incorrect valve adjustment
- Burned or bent valve
- Incorrect valve timing
- Broken valve spring
- Uneven valve sealing
- Valve stuck open
Cyllnder head:
- leaking or damaged cylinder head gasket
- l oose spark plug
- Warped or cracked cylinder head
Cylinder/piston problem (page 11-3)
Compression too high, overheating or knocking
• Excessive carbon build-up on piston head or combustion chamber
• Worn or damaged decompressor system
Excessi ve smoke
Worn valve stem or valve guide
• Damaged stem seal
• Cylinder/piston problem (page 11-3)
Excessiv e noise
Incorrect valve clearance
Sticking valve or broken valve spring
Excessively worn valve seat
Worn or damaged camshaft
Worn rocker arm and/or shaft
Worn rocker arm follower or valve slem end
Worn or damaged push rod andlor cam follower
Worn cam chain
Worn or damaged cam chain tensioner
Worn cam sprocket tee th
Cylinder/piston problem (page 11-3)
Rough idle
• Low cylinder compression
10-4