What I'm suggesting is that you work the steps and find out where your idle mixture is. When you started out I had no idea that you weren't trying to adjust the idle speed a little when you tried to come off the choke, and figured a lean mixture was killing the engine. I then gave you a procedure to follow for an initial setting of the air screw. That procedure will let the engine tell you if the mixture is right. If you can't tell whether the engine is running rich or lean at idle, install some fresh plugs and look at them. I doubt that #25 pilots would be too lean, but I know nothing about your intake and exhaust components. If you still have the generic Q2 needle jets in place you're going to have quite a struggle ahead of you.
A lean condition is usually signaled by hard, sharp misfires in transitions. A rich condition is usually signaled by a "soft" throttle, sputtering, smoke, sooty plugs, etc. Don't expect to be able to whack the throttle open without hesitation from the engine. Use a fast, smooth roll.
I've referred you to what I wrote for 650 Garage and to the Sudco Mikuni Tuning Manual, which has a very fine list of diagnostics. I don't have much to add to that.
A lean condition is usually signaled by hard, sharp misfires in transitions. A rich condition is usually signaled by a "soft" throttle, sputtering, smoke, sooty plugs, etc. Don't expect to be able to whack the throttle open without hesitation from the engine. Use a fast, smooth roll.
I've referred you to what I wrote for 650 Garage and to the Sudco Mikuni Tuning Manual, which has a very fine list of diagnostics. I don't have much to add to that.
