Leaky deaky carbs - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
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post #1 of 6 (permalink) Old 07-14-2015, 08:44 AM Thread Starter
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Leaky deaky carbs

So after putting 2.6 gallons of fuel in the 87 for the first ride, I noticed the pungent odor of gas. After some searching, I believe I found the source of my issue. However, due to my abysmal lack of bike knowledge, I have no clue what Im looking at. I took a short 3 min vid to show my issue and any help that can be provided would be much appreciated. If you click on the pic, it should take you to the video page. Also, if anyone could let me know what that white broken connector is as well, that would be awesome. Thanks gents and have a pleasant day.
carbs by Meeko Williams, on Flickr
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post #2 of 6 (permalink) Old 07-14-2015, 08:57 AM
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Pretty sure that is a vacuum port. It should be plugged up / capped off. If left open, bike will not run well. Basically it'll suck extra air into the carbs and make the bike do funny things.

Look around, there is a post dedicated to labeling carb parts.
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post #3 of 6 (permalink) Old 07-16-2015, 12:28 AM
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crowley is right about it being clog off unless you are running the original petcock then the center port of the petcock tube should be running to that port. If that is what that is, pull that hose contraption off and replace that tube with a 1/4 inch tube. I would use a clear tube to make sure you don't have a faulty petcock. I had that and gas was filling up in my carb the wrong way. A better picture of that a little further away would allow us to get a better idea of what we are looking it. Try to get a clearer shot.

I can't get to your video. It may be self explanatory in the video.

Grace and Peace to you!
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post #4 of 6 (permalink) Old 07-16-2015, 08:42 PM
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someone removed and plugged the vacuum line to the pet cock most likely because it is malfunctioning but the fuel looks like it is coming from above because it is on the choke may be a stuck open float make sure the fuel is manually "off" so it will stop leaking

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post #5 of 6 (permalink) Old 07-17-2015, 07:32 AM
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What's that hose connected to on the left side of the picture?
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post #6 of 6 (permalink) Old 07-20-2015, 03:56 PM Thread Starter
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Thanks for the input guys.

mrseedsower-I had a mech put on new petcock because apparently old one was broken. But from what I can tell all the hoses on the petcock go to places other than the vacuum port previously identified. If I pull off the middle petcock connection and find a way to rout it to the right side, what do I do about the port on the left side which I removed the tube from?

jayboog-The petcock was malfunctioning at some point, but no longer. I dont have an off positon, its an 87. Just have Res, On, and Pri. Its always left in On position.

crowley-The hose on the left side goes back into the frame and connects in a three way fashion with two other hose that are connecting to a device that is in front of the battery, if you were sitting on bike. I have linked three (3) pictures. The first show the hose on the leaky "vacuum port" on the R side. The second pic shows where that hose goes to under where the seat would rest, my finger is pointing at it. The third shows the left side of the bike around the petcock/carb area.

https://www.flickr.com/photos/133990.../shares/k792M2
https://www.flickr.com/photos/133990.../shares/Bu1T6E
https://www.flickr.com/photos/133990.../shares/W653c1
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