Question about choke circuit.

Rock,
sounds too me you might have an air leak.

Usually<from what I have seen anyway> if the bike starts fine cold with choke on or starts fine hot with choke off the pilot is relatively close.

If the bike is hard to start cold and yet starts fine with choke on when hot you are probably too lean on the pilot. If the bike starts fine cold but wont start when hot with no choke you are probably to rich on the pilot.

Higher than supposed to idle usually indicates lean. Now when you add choke it takes off , so somehow it is getting too much fuel <choke> and too much air<leak> making the engine think you have the throttle open. Although this might not be your problem just trying to explain what could be the problem and what too look for. Did you tighten the rubber boot on the carb when you tried changing jets? :eek:

Hope this helps
Jim

I just read an interesting post about the air screw , if the pilot is too rich and the air screw in tight that can cause the same problem. If the airscrew is 1 and 1/2 turns out from lightly seated and the bike starts fine hot or cold that is when you should be close.

Also when you took the torch to the magneto are you sure you didnt burn the seal behind it. I see your online shoot me a pm with your number again or call me if you have mine.

Ugh I just remembered I am only used to Mikuni carbs if you have a Keihin carb dont they have some funky choke knob/airscrew/idle thing. I have never messed with a Keihin so I am very unfamiliar with how that knob thing works.

Only some Keihin carbs have the funky knob. The PJ series ) have that knob. The PWM/PWK series have an idle circuit built into the carb and the choke knob doesn't affect the idle/mixture.