Ignition Coil

[Meshuggah]

Hello!

I've just bought a 1987 Mighty Boy, loving the thing! Just a quick question; what is the setup for the ignition coil? Having a little bit of trouble understanding the schematic that Team Mighty Boy has generously uploaded. Any help would be appreciated.

Cheers

PS. This website is bloody amazing

[ssc87]

Its a dual pole coil fed 12v direct when cranking and 12v ignition switched with inbuilt resistor on the other pole while running so reduced voltage

[Brayden]

As above. There are 3 posts on the standard coil. Earth, +12v and +9v that runs through a ballast resistor. The idea being that the coil gets +12v when you hit the key, then +9v when the engine is running so you don't burn out the points.

[Meshuggah]

Thanks very much for getting back to me so quickly. Really appreciate it.

So +12V from the ignition and +9V from the starter motor connection via the ballast resistor? The wiring wasn't particularly good to begin with, so just want to make sure I'm doing the right thing.

Cheers!

[Brayden]

No, you want 9v constant from the ignition via the resistor and 12v (on cranking) from the starter.

[Meshuggah]

Cool, thanks again!