I've been looking for ignition coils suitable for scratch-built CDI so I stopped by a local motorcycle shop and asked if they had anything in the junk bin. The friendly guy behind the counter tossed me a used DENSO 129700 "stick coil". It's a cylinder about 0.75" dia by 3" long and weighs 3.5 oz. I'll wire it up and try it with a Ryobi 31cc.

Anyone have any more technical data on these puppies? Wiring diagram? Coil resistance & inductance? etc.

Thanks, Dick.