Question about Yamaha V-Max Motorcycles

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I have a 2002 Yamaha Vmax with 6900 miles and 4 cracked coils. Before I replace them, I'd like to know the static readings I should be getting off of them. Also, any info as to what could cause all 4 to crack with such low mileage, would be much appreciated.

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Hi,

The major cause of coils cracking is to much heat.
Either ambient heat like from and engine or internal heat build up caused from to much high voltage being applied to the ignition system.

The second cause is usually from excessive gap in the spark plugs or the incorrect spark plugs been fitted.

I'm not too sure what you mean by static readings so I'm assuming you mean resistance readings which are:

Primary windings: 0.1 - 1.0 ohms
Secondary windings: 1.5 - 3.0 ohms

Hope this helps, let me know if you need more information.

Thanks

Jason

Posted on Jul 28, 2010

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