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No spark issue
by: trevcasey1 - Mar 24, 2018 4:31:27 GMT -6
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Post by trevcasey1 on Mar 24, 2018 4:31:27 GMT -6
Hi guys.I have a direct bikes db50qt-5 with no spark. New stator New cdi and New coil. The frame is connected to the negative terminal on the battery by a black wire with loops on each end and the green wire from the loom is connected to the engine case. But still no spark. PLEASE HELP!! I also have a black wire with a loop on each end around ten inches long and I'm not sure where it goes.... I have checked the voltage across all wires on the 20v setting on the multimeter I got the following readings from each wire... the blue and yellow wire direct to the coil I got 0.3v - 0.6v. From the boot cap I got 0.47v -0.82v. The yellow wire from the stator 0.49v - 0.62v. The white wire 0.59 - 0.73v. The blue and white pick up wire 0.69v. There is power going to the black and red wire that goes into the cdi because I got a shock off it but I couldn't get a solid reading from it, the digits were all over the place on the multimeter fluctuating from plus to minus. Any ideas please because I haven't got a clue and I'm stuck. Faulty loom maybe???
Thanks in advance
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Post by tvnacman on Mar 24, 2018 4:44:04 GMT -6
were they taken in the 20vac or 20vdc readings?
John
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No spark issue
by: trevcasey1 - Mar 25, 2018 9:04:10 GMT -6
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Post by trevcasey1 on Mar 25, 2018 9:04:10 GMT -6
20vdc
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No spark issue
by: trevcasey1 - Mar 25, 2018 13:16:11 GMT -6
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Post by trevcasey1 on Mar 25, 2018 13:16:11 GMT -6
I have taken the loom out to continuity test each wire (in progress will post results) as I was removing the loom I noticed that the indicator relay had the green wire disconnected from it so I have replaced it with another. Would that have effect on the bike not starting? I don't think so personally as I have a bit of knowledge but I thought I would ask just in case. Thanks in advance
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Doc's Anything Goes
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Post by tvnacman on Mar 25, 2018 15:04:51 GMT -6
Readings off the stator are AC.
John
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No spark issue
by: trevcasey1 - Mar 25, 2018 17:43:04 GMT -6
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Post by trevcasey1 on Mar 25, 2018 17:43:04 GMT -6
My apologies it was 20vac
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Doc's Anything Goes
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Post by tvnacman on Mar 25, 2018 18:34:30 GMT -6
the red/black wire off the stator should be over 30vac while cranking.
John
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No spark issue
by: trevcasey1 - Mar 26, 2018 1:35:22 GMT -6
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Post by trevcasey1 on Mar 26, 2018 1:35:22 GMT -6
Ok great thanks John it's much appreciated
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No spark issue
by: trevcasey1 - Mar 26, 2018 4:49:39 GMT -6
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Post by trevcasey1 on Mar 26, 2018 4:49:39 GMT -6
Thanks for your reply John. I continuity checked the whole loom to find there were quite a few dodgy connections so I replaced them accordingly. I put the loom back on the bike and did a few voltage checks... I have 30v+ coming out of the stator and into the cdi but nothing coming out of the cdi. I have tried four different cdi's (they can't all be faulty) one of them has an led light that lights up when I try to start it and that is quite bright so I know there's power going to it.is there a way to bench test a cdi with a multimeter? Any ideas please? Thanks in advance
Trev
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No spark issue
by: trevcasey1 - Mar 26, 2018 10:50:59 GMT -6
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Post by trevcasey1 on Mar 26, 2018 10:50:59 GMT -6
Success! After excessive reading of troubleshooting guides I found that the connection on the side stand kill switch was corroded I then disconnected it and checked for spark holding the boot with my hand and yes I got a whack from it so I connected the coil back to the spark plug in the engine and she fired up wahey lol.
She's been standing for a while so a carb and petrol tank clean is definitely needed. Will post results when she's running consistently. Thanks ever so much for your help guys it's much appreciated. Trev
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