Excellent runs, Cowboy! That's some serious giddy-up!
Back in `72, our best was 10.36 @ 136, Branch ported naturally aspirated CB-750's opened to 1100 (Action Fours), on all-out drag-dedicated rail frames, with good ($$$) sponsorship.
I just can't believe an XS is in the same class, rebel builder, unbelieveable, makes me proud...