Carb Question - Page 2 - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
From the gas tank to the carbs
All fuel system discussion

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post #11 of 13 (permalink) Old 11-05-2019, 09:12 PM
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the carb vent hose goes into one of the places I circled in your pic, either is fine, whichever works best for you

plug it most of the way in so the hose doesn't bottom out inside the hole, this can block air flow in the vent hose and cause fuel starvation
you can also prevent blockage by cutting the tip of the hose at a 45* angle so it doesn't bottom out, your choice



blocking the vacuum port is a good idea for now. still need to figure out if your bike has the air valve system. look at the engine picture here, do you have a hose attached to the circled port? (there's another one on the other side of the engine coming off the rear cylinder, not pictured here)
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post #12 of 13 (permalink) Old 11-05-2019, 09:19 PM
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I took a second look at your pic and realize I see that you DO have the air valve system in place. I can see the hose coming off the engine port.

instead of plugging that vacuum port you need to look for the air valve.

1 - follow a hose coming from either of the engine ports. (see my previous post)
2 - if you follow either of those hoses back to where they meet you'll see a brass valve assembly with 2 of the big hoses coming out of it. there is a third hose coming out of it, which is a vacuum hose.
3 - plug that hose in to the right-hand-side vacuum port.

that will return your bike back to stock.


other people will chime in about marbling/coasterizing. don't get ahead of yourself. they'll be talking about another modification that is VERY well documented on these forums. look for a sticky/how to if you want to do that mod. we should not discuss it further in this thread.

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post #13 of 13 (permalink) Old 11-05-2019, 10:52 PM
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Its been a while since I looked at it but as soon as I saw uber's pic I realized/remembered its not a tit after all but as he circled.

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