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Discussion Starter · #1 ·

some time ago I noticed gas leaking from the carburetor when the bike was running. I replaced the floats and the float valves. The gas still leaks. I can see it running out of the overflow between carburetor 1 and 2.
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When I close the overflow with my finger, the visible gas leak stops.

I bought a new petcock and after installing it the bike didn't start. I pulled the spark plugs, turned the engine over with the starter and a lot of gas came shooting out of cylinder 1.

What can cause this leak if it is not the float and not the float valve? I think carburetor 1 has an internal leak, floods cylinder 1 and excess is coming out of the overflow.

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