Weak spark - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 2 (permalink) Old 02-19-2017, 11:31 AM Thread Starter
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Weak spark

Fellow Vulcan owners.
I need help, my Vulcan 750 won't start, it's been sitting for 4 months undercover due to the fact i had an operation on my brain.

Ok what I have done is replaced both coils,HT leads & plugs & the battery, it turns over nice and quick but doesn't fire, every now & then it may back fire but mostly not firing. Changed the fuel, cleaned the jets checked the wires with a multimeter between the pickup & the igniter & between the coils & the igniter box as stated in manual all ok, I have spark although I feel it is week it looks white and thin, the book states blue and fat.
Please any advice would good thank you all.
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post #2 of 2 (permalink) Old 07-07-2019, 06:01 AM
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Lightbulb ArZo

Hi College,

I have the same problem on 1989 Vukcan VN750. I have done rewiring via relays to receive direct 12V to ignition coils, even. But without success. Cool engine-excellent start. Warm engine-trouble start. A lot of cranking. Weak white spark. Did you solve the problem?


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