yes they have great top- end in the late model600s and 750s
and the quartemile times arent bad either , i just meant these are not beginer bikes where the busa is hittin 160 between street lights the 600 s arent too far behind ! ninja 250 is a great starter bike but i would start with a little more get up and go , sportster 883 , can pick them up for 3500 to 7500 , if you wanted to go crazy , but i bet you can find a cb 750 for about 500 bucks insure it for 100 dollars for the year , if you drop it , who cares , if you wreck it , who cares , if you decide you dont like ridin or didnt use the bike as much as you planned you could probably sell it for what you paid and avoid the 3 year old gsxr 750 for sale with 230 miles ? or worse parting out whats left of a wrecked bike ! so yes the 600s are fast ! too fast for a beginner rider IMO