Theres a post on another site where 1 member has his set at 6600-6700 rpm. A tuner in the same thread set his at 6500 (i believe) and made 15 pulls continuous with no valve float. I'll see if I can find the thread...
mines set at 6549, 100 rpms higher than stock setting...turned out to be Just enough to avoid the engine cut out when I get on it.. I was usually too slow to react and recognize I had hit red line on the rpm gauge in 2nd and 3rd