Bike wont go - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
From the gas tank to the carbs
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post #1 of 12 (permalink) Old 10-20-2012, 07:52 PM Thread Starter
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Bike wont go

Ok so had the carbs rebuilt. Started bike ran fine for a week. Took off tank, cover, fenders and had them painted. Put everything back on and now bike starts fine but it it bounces from 0-2000rmps and when i give it gas it cuts off. So i opened gas cap to see if it was Poogs but still did same thing. I even went ahead and did the Poogs fix. Didn't work. I tapped carbs thinking maybe floats stuck but that didn't help. I checked and made sure petcock had fuel flowing which they do. I did get bike to rev up to about 5000rpms and it cut off once.
Any ideas?

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post #2 of 12 (permalink) Old 10-20-2012, 10:05 PM
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The 3 fuel lines that attach to the fuel tank, did u put them back on correctly ? Two lines go to the carbs to supply fuel the other is a vacuum line that causes the peacock to open and supply fuel to the carbs. Though u may already know this. Or something could of happened to the peacock during painting. That's my first guess.
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post #3 of 12 (permalink) Old 10-20-2012, 11:10 PM Thread Starter
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Yes i checked petcock after this problem started and made sure lines were correct.

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post #4 of 12 (permalink) Old 10-20-2012, 11:30 PM
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did you take the tank back off and check electrical connections after the problems started?
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post #5 of 12 (permalink) Old 10-20-2012, 11:38 PM Thread Starter
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Yes i pulled tank back off check all elec connections, and when put back together checked and made sure all plugs were firing.

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post #6 of 12 (permalink) Old 10-21-2012, 02:59 AM
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I had similar issue... Found it to be the vacuum line to the petcock was dry rotted, causing a vacuum leak...
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post #7 of 12 (permalink) Old 10-21-2012, 12:17 PM Thread Starter
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So this morning I pulled all plugs out and hit the starter again to check for spark this time a crap load of gas flew out. So i tapped carbs again got bike running and figured i might need pull carbs off again So i turned off fuel and started bike to let carbs run out gas. Well it didn't shut off. So pulled lines off petcock and now that's not working right, fuel is constantly flowing.
So i am figuring the petcock overfilled the bowls then the cylinder.
This bike is driving me nuts........

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post #8 of 12 (permalink) Old 10-21-2012, 12:45 PM
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Are you saying the gas constantly flowing from the peacock? If that's the case something has to be wrong with it. Gas should not flow without a vacuume applied to it. Also I'm wondering if you could have a float or needle valve problem.
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post #9 of 12 (permalink) Old 10-21-2012, 01:04 PM
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Be sure to ck for fuel in your oil, that much flooding I bet you will find it there!

04-3,200 miles bought July 2011 with 928 miles. Loaded with acessories to many to list here, see my albums for more details! I also make a custom tank bib specific for the 750 if anyone is interested, ck my albums for some pics.
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post #10 of 12 (permalink) Old 10-21-2012, 01:07 PM Thread Starter
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Yes fuel is flowing from petcock when bike is off. Luckly I caught it before gas got in oil. Now do they sell a rebuild kit for the petcock or do u have to buy a new one?
I am assuming float or something is sticking so I'm gonna have go threw carbs again..

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