Benelli ZAFFERAN 250 - IGNITION TIMING CHECK; Attach

30
Compression (With oil
applied into cylinder)
Reading
Diagnosis
Higher than
without oil
Worn or damaged pistons
Same as
without oil
Possible defective ring(s),
valves,
Cylinder, head gasket or
piston → Repair.
Compression pressure (at sea level):
Standard:
1.25Mpa/1500rpm
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M
•
easurement steps:
Crank the engine with the throttle wide open
until the reading on the compression gauge
stabilizes.
Before cranking the engine, ground all
spark plug leads to prevent sparking.
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8.
•
Install:
Spark plug
9.
•
Install:
Side panels
IGNITION TIMING CHECK
NOTE:
Prior to checking the ignition timing, check all
electrical connections related to the ignition
system. Make sure all connections are tight and
free of corrosion and that all ground connec-
tions are tight.
1.
•
Remove:
Timing check plug
2.
•
Attach:
Timing light
1
Engine tachometer
2
(to the spark plug lead)