so i bought a 'tank-breather valve' thing(y) you hook-up to your breather line. $5.95. it lets air into the tank and will not let gas out when you've dumped the bike onto its side. today i was filling my tank and the little metal valve from the 'tbv' fell-out and into my tank. F@#k. i tried to fish it out with a magnet-stick, but no luck. so my question is - how big is the gas line opening (main and res.) leading into the gas cock and carb? the lost valve is about 1/2cm round. will it fit into the gas line and cause problems? the thing that really kicks me in the ass is, that when i was trying to get the valve out of the tank, i noticed that my gas-cap came stock with a 'tbv' of its own already! i plan on getting it out anyways. but man what a headache. stupid i know!