AX100 CDI/Coil

**Skunk** · 22nd May 2008, 17:10

I've posted this in Buckets forum too:

I seem to have an issue with my CDI/Coil on my AX100 bucket. Now, I know nothing about CDI's and as this is a combined unit I need some answers to some basic questions (and quick - I only have one weekend to get this going and no money!)

1. Is my only option to replace it with another AX CDI/coil?
2. Can I get a generic coil and some other CDI unit? How do they wire together? (Currently only one LT wire from the stator to the CDI/coil)
3. Any other options?

**Skunk** · 22nd May 2008, 17:55

I've posted this in Bike Mechcanics forum too:

I seem to have an issue with my CDI/Coil on my AX100 bucket. Now, I know nothing about CDI's and as this is a combined unit I need some answers to some basic questions (and quick - I only have one weekend to get this going and no money!)

1. Is my only option to replace it with another AX CDI/coil?
2. Can I get a generic coil and some other CDI unit? How do they wire together? (Currently only one LT wire from the stator to the CDI/coil)
3. Any other options?

**nudemetalz** · 22nd May 2008, 18:59

Hey Skunk,

Have gone for the cheapest method first then upwards from there ?
Process of elimination method.
ie Spark Plug - cap - lead - plug coil and then the trickier stuff like replacing a CDI.

I see Jap Motorcycle Dismantlers are wrecking an AX100.
http://www.japmcdismantlers.co.nz/suzuki.htm

**gav** · 22nd May 2008, 19:07

Buy an FXR150 ......

**koba** · 22nd May 2008, 19:10

I'm no expert at all but from the little I do know..

So it has a CDI box instead of points and condenser?

Maybe try freezing it, It worked on my gsxr250 enough to diagnose it as a bad box and get another one.

If it had a magnetic trigger (hall effect?) instead of points that may be a bit bung, usually would stop it all together tho I think. To check it you need a wanky multimeter that can pick up the tiny pulses.
I may be able to nick my brothers one to borrow.

Also If it has a seperate condenser I have a brand new one you can use to try substituting it.

Coils should be generic from bike to bike but need to be run the correct way otherwise your spark will be shit and it will show erosion on the earth electrode of the plug, somthing to check actually...

**quallman1234** · 22nd May 2008, 19:14

You can borrow whatever from me if you get desperate. I won't be needing it (Untill the next bucket race) and it seems to work.

**Skunk** · 22nd May 2008, 20:14

Cheers guys. Except you Gav.

I've replaced the plug and leads. I've checked the LT wire (there's only one). No condenser. Don't see anything that could be a trigger on the flywheel. Pic shows the lighting and ignition stator. I've removed the (big) lighting one.
Second pic is the other end of the LT wire. One box with an HT lead...

So that leaves me the CDI/Coil combo (the Ignitor on some websites) and the stator. Voltage check on the stator seems OK. I plan to swap out the 'Ignitor' and see what that does.

My problem is what to do if it's either of those...

**Ivan** · 22nd May 2008, 20:40

That old motor I gave you had ummmm aTF185 stator on it and flywheel.
So try even TS125 etc, and then if you do thatand convert it to CDI that way then put on something like a KX125 or something CDI

**Skunk** · 22nd May 2008, 21:06

That didn't work too well Ivan. I replaced everything with standard AX bits.

I just don't understand CDI's well enough. Do they have a built-in advance curve or not?

Can I just use another CDI/coil? All the CDI's I've seen have four or more wires. How does that fit into my current setup?

**speedpro** · 22nd May 2008, 21:36

I think you will find that the CDI electronics is built into the coil. The ignition generator coil on the engine where the LT lead comes from generates an AC current which the CDI/coil uses as a trigger AND to make the spark. TS100/125s and KH100s use a similar system.

Some CDIs have a built in "retard" feature and others do not. I would be very surprised if that one retards at all. You definitely want an ignition that retards the timing as the revs rise and the motor comes on to the power. This allows you to advance the timing which boosts low and mid range power. I have used YZ80K, CR80?, and CR125(currently) ignitions and they all worked well.

Be careful touching the LT lead when spinning the motor. You might be surprised just how much voltage it makes.

**Skunk** · 22nd May 2008, 21:43

It makes around 100-150 volts AC. (Don't ask how I know...)

Thanks Speedpro. If it is the Ignitor at fault I'll look for one of those you mention. I have a KH100 parts bin so I'll look in that.

I'm going to test it by replacing with a RG50 one Sully60 lent me.

**Slingshot** · 22nd May 2008, 21:57

If you need to rape Frankie for bits just sing out. Don't know if it would be compatible though, she's got a little black box with some wires and stuff that go to a ceramic looking thing that the spark plug lead comes from.