B12 carbs

[clivegto]

Why would fuel pour out of the 2 air jet thingys at the back of number 2 carb, bike is not firing on that cylinder but has a good spark.

Ideas please.

[Captain Chaos]

sticky float needle

[Phill106]

I have same problem, been told it's a bad seal inside passing fuel. 

[Paulm]

I would have thought the float valve as well Clive

[fatblokeonbandit]

They all do it after a few years, as above the float valves not shutting, normally because a bit of crap from the tank has go stuck in the seat. Careful it doesn't all go down the bore and fill the sump

[Fula28]

B12 carbs I fitted on mates Westfield did same , new needle seats and bowl seals. 

[clivegto]

Striped them down cleaned them with carb cleaner blew them out with a air line and reset the float heights and they work now.