I actually went for a ride today. It idled and ran great for a while. It smoked some, but not a really bad amount and the guy behind me said it didn't smoke much at all while riding. I did get a pretty good amount of spooge. Anyway, as usual on the slow technical downhills where I am using engine breaking if I pull in the clutch and it will act like it is going to die. And then from then on on the rest of the ride it doesn't idle well. I get back to the parking lot and I put it in N and let it idle. It is steady at 2500 (maybe it is 1250, but I have the Vapor on the setting that gives me the least rpms and it is still 2500). It idles very steady for about 8-10 seconds and then over 2-3 seconds it will drop from 2500 to about 1000 and start to die if I don't rev it. Then it is steady for 8-10 and drops again. I finally turn off the gas and it idles fine and the rpms slowly started to rise until it died. So I assume turning off the gas makes it leaner. So maybe I should go smaller on the pilot or continue to back out the air screw some?
I get it home, heat it up to the same engine temp that it was in the parking lot (145) and ride up and down my street a couple of times and it idles great. It seems like it only happens after I do some engine breaking on down hills, then it is bad for a while. Outside of the leak down test, I have nothing else to try.