Briggs 5hp Flathead, Mikuni VM22

#1
Looking for some insight, I have a dual engine Rupp go kart and having some issues with the carbs. I have the narrow intake bolt pattern Flathead. I can’t seem to find a manifold that fits.

I made a set of manifolds but I can’t get the carbs to run right seems to just get a flat spot mid range and breaks up.
Anyone else run this setup? Is there a manifold that does fit? And recommendations on jets or cad settings?

I have a video of it running if that helps. Can’t seem to upload it.

Thank you
 

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#2
I
Looking for some insight, I have a dual engine Rupp go kart and having some issues with the carbs. I have the narrow intake bolt pattern Flathead. I can’t seem to find a manifold that fits.

I made a set of manifolds but I can’t get the carbs to run right seems to just get a flat spot mid range and breaks up.
Anyone else run this setup? Is there a manifold that does fit? And recommendations on jets or cad settings?

I have a video of it running if that helps. Can’t seem to upload it.

Thank you
believe this will work. It is Briggs part number 691922 1618356394680.png
 
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