Motorcycle Repair/Coil ohm's

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Question
QUESTION: Hello,

We have a 1987 Honda VT700C Shadow and we are trying to find out how much ohm's are in the coils, the stock ohm's.

Thank you

ANSWER: James, I don't know if I have specs on bikes that new...

http://www.regulatorrectifier.com/catalog/Honda-111 may have answers if you don't have a shop manual.

Other models from that time have about 2.5 ohms  and 500 ohms on the pulser coil. That was taken from a copy of the VT1100 manual, though.

If both coils are reading the same, then I would assume that they are both good and problems lie elsewhere.

Bill Silver

---------- FOLLOW-UP ----------

QUESTION: Hi Bill,

Thank you for responding, I don't believe there is anything wrong with the coils on this bike, I'm trying to find out about the OHMS of the coils because I'm considering installing Accel Coils and in order to try and find an Accel Coil that will work I need that information. We installed Accel Coils on our 1984 Honda 650CB and they make a huge difference especially when trying to start the bike. It use to be very hard to start but with the Accel Coils almost immediately it would start. Thanks.

Answer
The quickest way to find it is to measure the ones on your bike. From info I see on the web, CDI coils have .7 ohms and inductive coil systems use 3.ohm coils. Check coils with a volt meter on the primary connector. If you have no volts on the primary side with ignition ON, then the ignition is CDI. If you do have battery voltage there then you have inductive ignition.

Option 2 call them directly.   http://www.accel-ignition.com/

Bill Silver

Motorcycle Repair

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Bill Silver

Expertise

Need help with vintage Hondas from the 1960s? I am an expert with 250-305cc bikes in particular and most all of the other pre-91 models, in general. I do NOT claim to have a great deal of experience on Gold Wings, Cruisers, ATC/ATVs and dirt bikes.

Experience

I have owned/ridden/maintained Honda motorcycles for 35 years. I have written five books on Honda repairs and collecting. I was a service manager for two Honda shops back in the 1980s.

Organizations
VJMC (Vintage Japanese Motorcycle Club) of North America

Publications
VJMC newsletter, as editor for two years and as contributing editor currently.

Education/Credentials
3 years auto shop in high school, teacher's aide in Automotive Technology in Jr. College, Diesel mechanic course in college, self-taught mechanic and automotive writer.

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