I finally got my bike on the road yesterday and had a lovely 100 mile ride in the beautiful Australian sun. The bike ran okay, though the carbs have been falling apart rather rapidly, in all sorts of ways. Today, the bike hardly started and has been spluttering, and stopping as soon as it sits upright (also missing badly under load). I assume its the carbs (Amal MK1's). Ive tried to fix them but the slides are worn, the body threads are stripped, and they (like me) have seen better days. Ive ripped them apart and cleaned them several times. I think it might be best to buy a new set and keep the old ones for spares. I was hoping to get advice on the best settings for the new MK1 carbs (jets etc). I noticed the MK1 carbs come in a range from 28-32mm (not sure what this refers to and what would be best). The bike is: a 1950, Black Shadow, 8:1 pistons, BTH Mag. I am: a 1956 Average Model in all respects (average rider at average speed). Any advice would be appreciated. Rob Paton