Ok I expect a few dirty comments...
I have just managed to get my moped up and running yesterday and took it for a really short ride in the rain (15min) with my hack of an inline gas cutoff valve and a 1/4 inside diameter hose clamped to the petcock outlet on the gas tank. Its a 78 westlake if that helps.
I need to get it back up and running correctly cause it was running horribly yesterday couldn't go past 1/4 throttle without it drowning (and it did).
Ill upload pics tonight if anyone needs them from what I can tell trying to measure it looks like 11mm, I just don't want to order the wrong one.
thanks in advance