Anything and everything GT6.

Hi All,
My GT6 has started to leak a little bit of petrol (about 1 or 2 tablesoons) from the air filter of the front carb following a run. It appears to be leaking from the same overflow that petrol comes out of when the needle valve sticks open. There are no leaks at all when the engine is running. Has anyone come across this before??

Cheers

Ed.