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bimota DB7 - Checking the Coils; Spark Plugs

bimota DB7
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INJECTION - IGNITION
9
Checking the coils
The coils used on this model are known as “cigar” coils.
They are similar in appearance to a spark plug cap. They transform the low voltage from the ECU
into high voltage for the spark plugs.
To test the coils, proceed as follows:
Measure the resistance between the two pins (1-15).
The resistance should be 650 m±50; if not, replace the coil.
Spark plugs
Check the colour of the ceramic insulation around the central electrode: an even, light brown colour
indicates the engine is in good condition and running at the right temperature.
Secondly, check the central electrode for wear and measure electrode gap, which should be:
0,6
÷0,7mm.
IMPORTANT
Check the gap between the central and side electrodes. If the gap is not as specified or if the spark
plug has heavy sooty deposits, renew it.
Refit the spark plug in the cylinder head, first tightening it fully by hand.
Tighten to the specified torque
Refit the tank.
IMPORTANT
Do not use spark plugs with inadequate thermal rating or incorrect thread length.
The spark plug must be securely installed.
If a spark plug is loose, it can overheat and damage the engine.
Spark plug type
Brand: NGK
type: MAR10A-J
Sub 9-11

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