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The VintageBike Message Board => Autojumble => Topic started by: A10 JWO on August 20, 2017, 04:15:56 PM

Title: 12 Volt Coil testing
Post by: A10 JWO on August 20, 2017, 04:15:56 PM

My bike is in many bits as I am building it out of boxes. I have two matching 12 volt coils which are standard for the A65. Is there any way  I can bench test them before I polish them up ready for a refit on the restoration. Thanks.  :D

Title: Re: 12 Volt Coil testing
Post by: iansoady on August 22, 2017, 10:04:43 AM

You could jury-rig something similar to the bike's installation with a set of points + condenser, battery and suitable cabling plus an HT lead and plug.

IIRC primary resistance of a 12 volt coil is around 3-4 ohms, secondary several thousand and obviously no short to the casing on either.

Title: Re: 12 Volt Coil testing
Post by: bikerbob on August 22, 2017, 12:17:52 PM

If you go to youtube then type in 12volt coil testing you will find a number of videos showing you how to test your coil.

Title: Re: 12 Volt Coil testing
Post by: A10 JWO on August 22, 2017, 01:30:34 PM

Thanks lads. :)