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Hello, I´m Diego, from México, hope you can help me.

I own a Cagiva Raptor 650 2006 with is the same engine as SV650.

New Battery, new spark plugs.


The problem is that rear cylinder is not firing, both coils are fine.
Front cylinder starts and work fine with both coils, so coils are ok.

Put both wires near the head and just the front has spark.

The coil for the rear cylinder is not getting signal from ECU so there's no spark.
The lines between ECU and Coil are ok.

I'm thinking maybe ECU is bad.

Any ideas?

Thanks.
 

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If I am right the ECU grounds the coils to make the spark.
So you have to check if the coil is getting the 12v from battery when the ignition is on.
 
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