A no bar bike running in the 6's in the 1/4 mile is highly unlikely. Here is a video of the fastest no bar bikes testing at my track:
The turbo bike, which lost on this run has been 6.90's at 204mph in the 1/4. His bike has been outlawed from 1/4 mile racing. The nitrous bikes best times this year are 7.0-7.10's, which puts them at 4.6_ in the 1/8th.
We haven't had a new 08 busa at the track yet. I think someone is bringing one on Saturday. I've gotten big into bike events. I just put together a big pro mod bike show for next year.