I have done 10:30 @131mph. The quarter mile time is directly proportionate to your willingness to rev it up and drop the clutch.
It took me an afternoon to really work up the courage to launch it hard.
I have only drag raced it in the "as I ride" set up, so there is more to be had and I'm a fat guy.
I think if you strapped the front end and could launch it hard enough it would be 10:10-10:20. Close to 140mph.
10:30 is about all I will get out of it, and I'm probably more comfortable running 10:70's on it.
It is a decent drag racer, I have put in pass after pass mostly stopping when I needed a break, not the bike. It warned up, but the return back to the staging lanes was enough to cool it back down. I was trying to keep the temp under 190 as I rolled to the line, and that was in TX in August last time I had it out.
A factory quickshifter would be nice.