Stock Pilot is a 42. I'd be guessing its probably a bit rich off the bottom. Like it burbles a bit before taking iff which in my experiences makes it very on/off (Rich to lean transition/hit)
You have a few options here, which include trying to lean out the pilot, bny turning the brass Air screw out some more. If you see improvements, and end up more than 2.5 turns out you'll need to go to the next smaller pilot. If the bike is burbling up towards 1/4 throttle and the AS has little effect then you may want to look at going one clip leaner on the needle, orrr... What I would probably do is look at trying the red needle, as its leaner, particularly in the lower throttle positions.
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