Cylinder Head/Valves Troubleshooting; Low Compression; Compression Too High; Excessive Noise - Honda CH250 Elite 1986 Service Manual

CYLINDER HEADIVALVES
TROUBLESHOOTING
top~end
problems usually affect
noises with a rod or stethoscope.
low
cornpress,ion
Valves
Incorrect valve adjus:trrlerlt
Burned
or
bent valves
- Incorrect valve
- Broken valve
Cylinder head
Leaking or head
WI~rn,Ad or cracked head
'-ylll"U""
and IRefer to Section
71
performance. These can be diagnosed by a compression test, or by tracing
COml=lrel$si<)n too
• Excessive carbon build-up on
chamber
Excessive noise
• Incorrect valve
adju~;trTlerlt
~tid(iin[l valve or broken valve
Damclgeld or worn camshaft
Loose or worn cam chain
• Worn or cam chain tensioner
• Worn cam sprocket teeth
• Worn rocker arm and/or shaft
6..2
or combustion