So I am working on a friend's Sami. It runs great cold when the choke and high idle are on, but as soon as the choke goes off it dies. It will run great above 1200 rpm but anything below it begins to load up and dies as soon as you let off on the gas it dies. All the vacuum lines are good and routed correctly. How do I adjust this carb. I can't seem to find anything about adjusting it anywhere. Any help would be appreciated!