How do! The petrol tank on my blue G40 has stopped breathing! When you open the fuel cap, it belches out fumes with a fair bit of force. I suspect that the one way valve on the filler neck to the charcoal canister pipe is buggered - has anyone seen this before? I need to find a working valve before I drop the tank, so if anyone has one or knows where one can be bought, I'd be most grateful.
Cheers, Steve