I took the Z in for a UpRev tune and dyno runs today at AWDTuning in Flower Mound, TX. Keith was a real top notch guy and tweaked out all he could.
The dyno graph shows a base and mods w/tune.
274.2 @ 7121 rpm / 116.3 mph
237.6 @ 4824 rpm / 78.8 mph
The cooling fan was a loud 84db, so it is hard to hear the exhaust until the pedal hits the metal. The exhaust hit 104db at the peak of the dyno run.