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Hello. I just got this bike and let's say that I'm finding out all its skeletons in the closet.
Cranks over no start.
Fuel petcock works. But no vacuum line just one port.- fuel
PO claimed his guy went through all the carbs ( maybe)
I found a capped line on the second carb from the right which i assume is a vacuum line? If so where does this go?
Automotive tire Motor vehicle Gas Auto part Automotive exterior

I do see a line from the top of the engine to the airbox and I think it might be related.
Thanks for any assistance.
 

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CB125T, EX250 commuter, Ninja 250 racebike, CBR250R(MC19), VF500F, CBR600RR, VFR750F
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First priority should be to find official Honda workshop manual for that bike.
 
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That brass tube pictured is an adapter for vacuum gauges used to balance the carb bank .
The vacuum line for the OEM petcock comes from the forward mount of carb #2 ( 2nd from the left ) .
 
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