I was nervous about the 1-2 shift also, but it goes through it just fine at the dragstrip. I don't use 1st at the track. Clutchless shifting is really only good for high-RPM WOT, if you're just putzing around use the clutch. On my CBR and probably most 600s, the revlimiter is a good shiftpoint for 1-2 and 2-3 with the RPM drop. After that there may be something to be gained by shifting a little earlier, depends on your power curve.