CYLINDER HEAD/VALVES
7-4
Compression OF THE CYLINDER
d
The Hot engine to its normal operating temperature.
The engine stop, remove the noise dampening layer
and spark plug power. Install the adapter and the meter
compression in the hole in the spark plug. Open
completely the accelerator and operate the engine
through the start system.
NOTE
Cylinder compression: 1.128 kPa (11,5 kgf/cm
2
, 163,6 psi) a
400 rpm
If the compression is high, indicates excess deposits of
carbon in the combustion chamber or in the head of piston. If
the compression is low, pour 3 5 cm3 of motor oil clean in
the cylinder, through the hole of the spark plug. Check again
the compression. If the compression maintains the same
previous value, to conduct a test of leakage. If the com-
pression increases its value prior, inspect the cylinder, the
piston and rings of the piston.
A low compression can be caused by:
•Damage to the cylinder head gasket
•Wear in the cylinder or rings of the piston
•Wear in the cylinder and piston
•Incorrect Setting valves
•Leaks in the valves
•
Activates the engine through the system of start-up until
the reading in the meter stop to climb. The maximum
reading normally reaches within 4 7 seconds. •Does Not
operate the engine through the start system for more
than 7 seconds, to avoid the discharge of the battery.
In the event that is necessary to make services with the
engine running, make sure that the local work is well
ventilated. Never put the engine running in closed areas.
The exhaust containing carbon monoxide poison, which
can cause loss of consciousness and even death.
Activates the engine in a local open, or in a local closed
equipped with a ventilation system and extraction of
gas.
CBX250
SPARK PLUG
LAYER SUPPRESSIVE NOISE
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