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Author Topic: no spark.  (Read 8933 times)

gremlim

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Re: no spark.
« Reply #15 on: February 15, 2015, 08:50:19 AM »
I thought it was ac as when I got the bike the battery was flat but it still ran ok :-)
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zombie

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Re: no spark.
« Reply #16 on: February 16, 2015, 04:02:34 AM »
2T, My bad... I keep mixing them up.
 
Shaka once said that swapping his rectifier fixed a no spark. I never looked at the wiring diagram to confirm this GUT I have heard it said here.

Did you try clipping the black/ yellow stripe wire at the cdi?

Also thy a continuity meter thru all the wires to the cdi, and Ign switch / stator.

Either something is open or shorted. Ie: broken wire inside the insulation or the bl/y wire shorted to gnd.
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gremlim

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Re: no spark.
« Reply #17 on: March 07, 2015, 06:02:53 PM »
Hi all I have an update on the problem. I have tried a new rectifier and have cut the yellow and black wire but still no spark. I have also checked all wiring from the ignition switch through to the cdi and the coil and they check out . Anyone have any other ideas?
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zombie

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Re: no spark.
« Reply #18 on: March 07, 2015, 06:55:20 PM »
Everything is new so it is either the engine/frame/battery ground or you have a defective component. Check the spark plug, and the coil/coil wire for continuity. Check all the ign. wiring for a short to ground.

Sometimes disconnecting everything, and running jumpers (new harness) will help you narrow it down.
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gremlim

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Re: no spark.
« Reply #19 on: March 08, 2015, 02:50:53 PM »
I might sound a bit stupid but how do I test for a short to ground? And where do I start.
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tortoise

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Re: no spark.
« Reply #20 on: March 08, 2015, 04:50:35 PM »
Quote from: gremlim on March 08, 2015, 02:50:53 PM
how do I test for a short to ground

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zombie

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Re: no spark.
« Reply #21 on: March 08, 2015, 07:26:54 PM »
Set the meter on any Ohms setting. 10k works well.

Touch the tips together, and it should swing to "0".

Put the negative lead on the battery, and start probing wires. Don't poke holes in them just go in at the connectors.

I would start at the stator, and work thru from there. Disconnect all the components, and check each wire. The only wire that should read "0" are the Green wires. They are grounds. Every one of them should read "0".

All the rest should show no movement of the meter.

I would check the spark plug too.
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"They have nothing in their whole imperial arsenal that can break the spirit of one Irishman who doesn't want to be broken."   Bobby Sands...

gremlim

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Re: no spark.
« Reply #22 on: March 11, 2015, 04:53:54 PM »
I have had a quick look and have readings of 420 on the black/yellow wire from the ignition coil and 120 from the blue/yellow wire at the  excitercoil. Meter was set too 20k. Does that mean anything bad?
« Last Edit: March 11, 2015, 08:51:05 PM by gremlim »
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gremlim

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Re: no spark.
« Reply #23 on: March 16, 2015, 06:02:33 AM »
Anyone have any idea?
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Triesandluth

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Re: no spark.
« Reply #24 on: March 17, 2015, 10:50:27 PM »
Did you say your battery is good or not?  Just stalking the thread,  waiting for your success.
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gremlim

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Re: no spark.
« Reply #25 on: March 18, 2015, 05:33:55 PM »
An update. I have checked all the wiring again and have found a reading of 0.70 on the blue/black wire from the cdi to the ignition. Is that a sign of a broken wire?
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gremlim

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Re: no spark.
« Reply #26 on: March 28, 2015, 06:26:15 PM »
Anyone?
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gremlim

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Re: no spark.
« Reply #27 on: July 02, 2015, 07:14:23 AM »
Bump
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zombie

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Re: no spark.
« Reply #28 on: July 02, 2015, 08:46:34 PM »
Yes. The wire should read 0 ohms.
I have found the copper does not always continue thru the insulator.  One bike in particular, a TGB had several wires that had ONE strand inside. I stretched the wire, and it broke like a piece of spaghetti.

Have you tried just jumping the wire?
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"They have nothing in their whole imperial arsenal that can break the spirit of one Irishman who doesn't want to be broken."   Bobby Sands...

gremlim

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Re: no spark.
« Reply #29 on: July 03, 2015, 07:06:48 PM »
I have tried that without sucess. I am going to take the complete loom out this weekend and will check the whole thing and replace if necessary
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