ORIGINAL: markmeinteil

My friend's Honda CB650 has been having problems leaking gas between the needles and seats, causing gas to over flow big time! Thinking the needles must be bad, I replaced the needles with new ones which worked... for a few minutes until gas started pouring out again. I was told by the local shop that sometimes if you use some metal polish on the seats, it can help with sealing between the needles. So I removed the needles, and polished the seats with a little metal polish, but this did nothing.[:@] I know for a fact its the seats that leak. With the bowls off, if you hold the floats up with your fingers no gas will flow. But if you momentarily let them down for a second to let some gas out, then push them back up again, a couple of them will keep allowing some gas through. All the seats look good too. This has to be the strangest problem I've ever had with a carburettor.

Does anybody have an idea?