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These are from the Magna Project, and while otherwise pretty clean and in generally good condition, the well-meaning previous fiddler obviously didn't spring for fresh bowl gaskets, instead gooping on way too much RTV in an effort to seal the float bowls. This is a Bad Idea. Those excess globs of RTV can separate and find their way into the carbs, clogging passages which may never clear. It also makes a mess for the next guy to clean up.
The VITON bowl gaskets that I supply for the VFR don't fit the earlier VF because the bowls have a deeper groove, preventing the o-ring from making a dependable seal. The solution is an OEM or aftermarket carb rebuild set; about $100 on eBay.
Pictured is the set of VF750C carbs disassembled and waiting for their fresh bits and pieces.