I have a 1964 Honda c100. There's no spark and I would like to test the two coils in the magneto and the main coil pack?
I have a 1964 Honda c100. There's no spark and I would like to test the two coils in the magneto and the main coil pack?
I can't work out how to add more info, but I do have a multi meter and I red you can test the ohms. Anyone know what sort of reading I should be getting? And the best way to test them?
Inductive coils typically have very low resistance, 2 or 3 ohms, which is too low to test accurately with most DMM's, but you should be able to tell if the coil is open (infinite resistance). Best test for spark is to pull the plug, leave the spark plug wire attached and hold the tip against the side of the engine and kick start or use the rear wheel to turn over the engine. Do it in the shade so you can see the spark. I would use leather gloves… But that's me not wanting to shock myself. You can use the AC volts function on your meter to see if your coils are putting out anything. But be careful. The high tension coil for the spark plug puts out around 20,000 volts, which will blow your meter. The best tool to really see what's going on is an oscilloscope with a 50kV probe.
Clean and adjust the points first and see if it fixes the no spark issue.
Update: No joy, you need a service manual for your bike to get the resistance specifications of the coils and check the magnetos and check the ignition coil.
Update2: Read this too: http://www.dansmc.com/electricaltesting.htm
This bike belongs in a museum…
The '64 C200 is a very rare bird. At least around here!
I'm dead serious. Contact your Honda Dealership and they 'might' want to put that thing in their museum in Tokyo provided its in 'pristine' condition and has all the original parts and accessories.
You'll get paid well. Enough to buy a new CB1000R.
It's worth a shot, mate.
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