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Aftermarket carbs.....

I’m installing the Keihin CR29 carbs, they’ve been spaced for my bike and jetted (supposedly) for my engine.
however I’m unsure on hooking up fuel lines, are the spigots on side of carb vents?
I can’t seem to find any literature except to run a two cable system.
 
There is usually 3 fuel tees on the filter side of the carbs. One between each outer pair and one between the inner carbs. You can feed from any of the three and block off any unused. They usually come with extra plugs but if not get some fuel resistant caps that fit the tees. I run duel fuel lines on my big bore motors and use the outer two fuel tees and block the center one. The bowl vents are the angled elbows on the left side of each carb.
 
So hook it up to two fuel tees.... Probably one on each of the outer carb pairs and block the center one.
 
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