Ah the 10TT9 carb, that brings back memories. I filled up with petrol one day, 1960'ish, and kept the engine running so as not to have to restart it. I went in to pay and left the girlfriend on the throttle to stop it stalling since there isn't any tick over adjustment screw. While inside there was this horrendous racket outside so we all rushed out in time to see the bike vibrating across the forecourt with her attached to the throttle, turning it the wrong way, bloody hilarious. Morals of the story - don't trust a female with your pride and joy and also ask yourself if you really want to run with a carb that doesn't have a tick over facility. Good luck anyhow.
Alan