How to test CDI?

makenzie71 · 05-13-2011, 11:24 PM

I have that CDI. I need to confirm it's good...how do I test it?

Then, I'm wiring it into a bike with no wiring harness. Ground, trigger, and coil I got figured out.

Do I need to leave a kill switch lead in? I would like to avoid that.

AC Ignition power...is that just 12v in?

Thanks

makenzie71 · 05-13-2011, 11:30 PM

okay the AC ignition in actually wires into the engine. When I crank the engine over I get a little under 1vac. Is that an acceptable incoming voltage?

FastDoc · 05-14-2011, 12:57 AM

For all intents and purposes they are not readily testable. At only a few bucks each just replace it with a new one (good to have no matter what) and see what you have.

JMHO. 8)

makenzie71 · 05-14-2011, 02:16 AM

Well I still think I have a weak(ish) stator, but it runs now.

Problem is actually the wiring harness. I wiggle it and it works. I pulled the whole thing apart looking for shorts and breaks and found nothing. Some of the wires are brittle, though, which means there could be breaks inside.

It's a Lifan 250cc vertical cylinder engine. Where can I look for a good wiring harness?

05-13-2011, 11:24 PM	#1
makenzie71 Join Date: Dec 2008 Posts: 412	How to test CDI? I have that CDI. I need to confirm it's good...how do I test it? Then, I'm wiring it into a bike with no wiring harness. Ground, trigger, and coil I got figured out. Do I need to leave a kill switch lead in? I would like to avoid that. AC Ignition power...is that just 12v in? Thanks
	0

05-14-2011, 12:57 AM	#3
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	For all intents and purposes they are not readily testable. At only a few bucks each just replace it with a new one (good to have no matter what) and see what you have. JMHO. 8) __________________ Happy to serve.
	0

05-13-2011, 11:30 PM	#2
makenzie71 Join Date: Dec 2008 Posts: 412	okay the AC ignition in actually wires into the engine. When I crank the engine over I get a little under 1vac. Is that an acceptable incoming voltage?
	0

05-14-2011, 02:16 AM	#4
makenzie71 Join Date: Dec 2008 Posts: 412	Well I still think I have a weak(ish) stator, but it runs now. Problem is actually the wiring harness. I wiggle it and it works. I pulled the whole thing apart looking for shorts and breaks and found nothing. Some of the wires are brittle, though, which means there could be breaks inside. It's a Lifan 250cc vertical cylinder engine. Where can I look for a good wiring harness?
	0