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Post by oilman on May 25, 2015 20:39:48 GMT -5
The ignition went out on my 77 PE250. I swapped in another coil (it had damaged primary wires) , then a new cap. Finally tried a CDI off a 81 RM125 ( I think) and bingo lots of spark. Problem is the old CDI had a wire for the kill switch, the substitute does not. Is my goal to wire my kill up to the positive side of the coil?
Second question. Seems to me someone had a page on the net once about using a Chrysler 70's vintage CDI on motorcycles. I cant find it now. Anyone have a link?
Thanks, Lorne.
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Post by Jim on May 25, 2015 21:46:00 GMT -5
I can probably help if you can come up with the appropriate wiring diagrams. Post them if you can, or email them to me.
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Post by oilman on May 26, 2015 18:28:48 GMT -5
Do you mean diagrams for the Suzuki CDI or Chrysler? I think I may have seen that link on Maxrl's site. Going to go have a look now.
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Post by oilman on May 26, 2015 18:31:03 GMT -5
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Post by Jim on May 26, 2015 18:52:05 GMT -5
Your first question was how to wire the kill switch. If you can link me to a wiring diagram for the motorcycle that the CDI unit you're using was meant to be used in, I can probably answer the question. The Diagram for your motorcycle will help too.
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Post by oilman on May 28, 2015 11:58:25 GMT -5
I'm afraid I have no wiring diagrams. No manuals etc. I think I'm going to make a jumper at the ignition coil plug with a plug in for the kill switch there.
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Post by Jim on May 28, 2015 20:31:42 GMT -5
Guessing isn't a good solution. I've had customers wire kill switches wrong and blow a brand new CDI unit.
I was hoping you'd take the time to search for the wiring diagrams. I just did and found both. Assuming you really have a CDI unit from an RM125, it looks like you ground the CDI unit's black/yellow wire to kill the ignition.
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Post by oilman on May 30, 2015 0:07:55 GMT -5
Originally I went looking for PE250 diagrams and found none. I have manuals for the RM but I didn't think to post the diagrams as the rm is a rotor type and the PE is a flywheel type. Which is alternating current on the first and DC on the second I think. And generally different harnesses I would assume. Swapping in what I assume is a RM CDI on the PE was just a stop gap solution to get me going while I figure something more permanent out. I'm also thinking now using something like an automotive CDI on the PE is probably a no go as I would need a DC power supply to make it work. And as stated I believe the PE puts out an alternating current. But I could be wrong.
Yes on my running RM125 the black yellow is the kill switch wire. It was the same on the original PE CDI. The CDI off the RM parts bike for some reason is a four wire unit. Which does not appear to have a kill switch provision. But I get one heck of a good spark from it. Bike seems to run fine. At first I would have thought by grounding the blue white coil + wire the extra load would be on the pulser coils. Which may have been bad for the pulser coils. But now that I think about it the CDI unit probably amplifies the voltage to the coil? So I could see your point about exceeding the amps or watts the CDI is rated for. If a CDI unit does not have a plug in for kill switch, I wonder, where does one usually kill the circuit?
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Post by oilman on May 30, 2015 12:03:18 GMT -5
Oops correction. One CDI has six wires the other five.
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CDI advice
May 30, 2015 12:27:38 GMT -5
via mobile
Post by Curtis on May 30, 2015 12:27:38 GMT -5
Why not ground the coil itself as opposed to the CDI,
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Post by oilman on May 30, 2015 16:46:46 GMT -5
That's what I was thinking of doing. Make a little jumper lead that plugs into the primary wires from the coil to CDI. Thus killing power to the coil. But Jim is concerned this will be too much for the CDI.
I think on the PE the Pulser coils feed the CDI. Which amplifies the the voltage to the coil primary some. At the cost of amperage I assume. I think this is under two amps guessing from some DIY threads I glanced over. I don't know much about this sort of thing. That's why I thought I would ask. If anyone has some good threads or web pages to suggest, I would love to learn more. I have not had much time to invest into it. Been busy gardening and haywiring my rototiller back together etc.
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Post by oilman on Jun 1, 2015 12:15:08 GMT -5
Kill switch did not work. bike kept running.Maybe I'll try an on off switch.
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Post by oilman on Jun 1, 2015 15:08:34 GMT -5
Well that worked. Repurposed the head light switch. Which now interrupts the coil + wire. For how long?  ? |
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