Carburator flooding on bench setting

[Primate]

I figured that might be somthing to do with it thanks for the info ill fit them on the bike and see what happens 😉

I had a similar problem. It turned out to be floats sticking. When I shook the carbies side to side or tapped the bowls with a piece of wood they eventually stopped. As I have been running fuel through them more often now it doesn't seem to happen.

[Colin]

I had a similar problem. It turned out to be floats sticking. When I shook the carbies side to side or tapped the bowls with a piece of wood they eventually stopped. As I have been running fuel through them more often now it doesn't seem to happen.

[Jonesy :-)]

all 4 carbys overflowed? or just one? Leaking fuel inlet needle and seat + leaking vacuum diaphragm fuel taps are the achilles tendon of these machines. Bent float bowl pins can cause floats to stick. Brass or plastic floats in yours? Brass ones can get pinholes and fill with fuel so they won't float.

[Primate]

Hi there thought I'd introduce myself I have a 1978 xs hack that I have rebuilt from the frame up ,she is very close to done but In my wisdom I over tightened the pilot jet screws and guess what I snapped all 4 of them in there  😶 and I figured I had really stuffed up as im sure any one who has broken one off knows they are a bastard to get out, but after lots of careful pick work and making up a custom tool I managed to get them all out
 😉 , so ordered 4 completed rebuild kits for them , rebuilt over the weekend and I thought I'd have a go at doing the fuel level trick that Andy from Andy's obsessions did on one  of his videos , when I ran fule threw the sys it just kept filling and over flowed thrw the main body of the carburettors ( and all over the bench/floor ) . I have triple checked the float heights and run a full inspection of the carburettors ,just wondering if Anyone has an idea what might be the issue here and where I should start looking to fix it . Cherrs in advance Tarn