switch to a single carb - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
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post #1 of 19 (permalink) Old 04-01-2012, 04:20 AM Thread Starter
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switch to a single carb

Has anyone switched to a single carb
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post #2 of 19 (permalink) Old 04-01-2012, 08:46 AM
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not to my knowledge.. but it is possible... me and one of y buds discussed the pros and cons for about 2 years... and the only reason we didn't do it was because we couldn't find the right cfm carb for the right price
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post #3 of 19 (permalink) Old 04-01-2012, 02:16 PM
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Ya know, I been pondering this ever since I got my Vulcan. Ive always had Harleys in the past and really liked the one carb setup. I been trying to figure out a 2 into 1 aluminum intake manifold that might work. A guy I know who builds DIRT cars has a CNC machine and could do it for me if I designed it. Thinking about it. Harley uses a single Keihin CVK-40 or 42 on theirs, so should work on ours. Then again, depending on how ya build the manifold, a sweet S+S might be nice !!! Im lucky enough to have a CAD program from my surveyor days, and I can prolly get the additional files for doing a manifold...this might end up saaaweeeeettttt !!!!



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post #4 of 19 (permalink) Old 06-03-2012, 07:33 PM
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So is anyone working on this??? Any info at all? Ideas?

I am thinking this would be a good winter project for the bike.

i would like any Ideas or thoughts.

I hope to get it set up with a single Lectron carburetor. But I have no clue where to start.

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post #5 of 19 (permalink) Old 06-03-2012, 09:58 PM
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first place to start is finding a carb that will flow the correct cfm, then design an intake that will deliver the fuel/air mix to the engine in an efficient manner, and third hook it all up... as for what to use.. you are on your own there bud... my buddy and I were thinking of using a webber carb, or a carter YF downdraft carb.
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post #6 of 19 (permalink) Old 06-03-2012, 10:56 PM
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If your gonna spend the time redesigning the fuel delivery system, how about fuel injection....
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post #7 of 19 (permalink) Old 06-04-2012, 12:43 PM
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I thought about Fuel injection but I want to make everything more simple. I found the carburetor I want to use it is a Lectron ( http://lectronfuelsystems.com/ .) They are self metering and there are no "JETS" to replace. They auto adjust. I know of several people running them on XS650's with great success. I just need to figure out the intake for the Vulcan.

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post #8 of 19 (permalink) Old 06-06-2012, 11:03 PM
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Any thoughts on using a manifold off a Vulcan 800? I think it only has one carb but I'm not sure what the setup is like vs the 750..

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post #9 of 19 (permalink) Old 06-07-2012, 07:29 PM
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The intake ports are angled differently (more like a Harley's) on an 800 (I checked). Any decent machine shop with a CnC machine could mill one out given a design to work from. that would require removing existing carbs, and getting precise measurements including angles, and transfering them to a CAD drawing. Then they could go to town. A 42mm Weber would be perfect I believe, or why not then just go with a sweet S+S ?
I used to have an addy to a company who custom makes manifolds. Drop off the bike, and in a week its done. Cant find it fer squat tho now. And my buddy who had a shop I just found out retired.




Last edited by Wolfie; 06-07-2012 at 07:31 PM.
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post #10 of 19 (permalink) Old 01-11-2013, 09:08 PM
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I got one carb on my 800, I do not recall what it looks like in there but I am pretty sure it is just an open pot to two smaller 'hoses' for lack of a better term that go to each jug....

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