I won LW Superbike yesterday and I'm paying for it today. Muscles I didn't know I had, are sore. There was one SV650 in the class.
After getting a so-so start (balked by a 600 in a different class ahead of me) I picked off the RC on the back straight and never saw it again. The SV was ahead and had more acceleration but I had more cornering speed. While I was setting up for a pass into corner 1 the SV rider outbraked himself, ran wide, and I never saw that bike again, either. But apparently there was quite the melee happening just behind me.
A couple of the Bridgestone Cup riders (on modern 600s) lapped us around lap 9 or 10 which suggests that our lap times are around 10% off the modern 600cc times, which is really not bad for having half-ish as much power.