Starts on one cylinder - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums > Technical Forum > VN750 General Discussion > Starts on one cylinder
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post #1 of 19 (permalink) Old 11-25-2013, 04:51 PM Thread Starter
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Starts on one cylinder
When my bike is cold it starts very quickly but seems to start on one cylinder. It takes 5-10 second before it sounds like the second cylinder kicks in and the RPM's jump. Is this normal? I start it with full choke and the bike starts within about a second of pushing the button.

-Robert
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post #2 of 19 (permalink) Old 11-25-2013, 05:43 PM
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Mine does that once in a while, usually if it sat a few days or the weather is really cool.

Think it just takes a bit to get the fuel going.
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post #3 of 19 (permalink) Old 11-25-2013, 05:48 PM Thread Starter
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Mine does that once in a while, usually if it sat a few days or the weather is really cool.

Think it just takes a bit to get the fuel going.
Ah, that's a good point. I typically only get it out every other week so its possible one of the cylinders is draining down. Could even be a real slow leak in the bowl???

-Robert
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post #4 of 19 (permalink) Old 11-25-2013, 05:52 PM
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Mine does it if she sits a day or two
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post #5 of 19 (permalink) Old 11-25-2013, 06:19 PM
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Yes somewhat normal, as long as its only 5-10 seconds before it kicks in.

SeaFoam helps as does iridium plugs. On inline fours I know synching the carbs helps - not too sure about V twins, but worth a look.
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post #6 of 19 (permalink) Old 11-25-2013, 07:04 PM
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Mine does it when it is cold and I have trried every thing to stop it but no matter what I do short of running the rear cylinder extremely rich but that causes problems after she warms up so I just live with it
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post #7 of 19 (permalink) Old 11-25-2013, 07:12 PM Thread Starter
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Yes somewhat normal, as long as its only 5-10 seconds before it kicks in.

SeaFoam helps as does iridium plugs. On inline fours I know synching the carbs helps - not too sure about V twins, but worth a look.
My carbs should be pretty solid, they only have a couple hundred miles on them since I cleaned them and replaced the seals, etc.

-Robert
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post #8 of 19 (permalink) Old 11-26-2013, 11:58 AM
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It might have something to do with ethanol, you think?
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post #9 of 19 (permalink) Old 11-26-2013, 02:40 PM Thread Starter
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It might have something to do with ethanol, you think?
Could be. I think all legal gas in California now has some ethanol aside from the 100LL at the airport.

-Robert
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post #10 of 19 (permalink) Old 11-26-2013, 02:48 PM
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I used to have the same problem with my bike. I fixed it by doing the pickup coil mod, and the ignition coil relay mod. now my bike starts and runs on both cylinders 100% of the time.
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