Well, Suzuki rated the 2nd gen B6 at 77 HP, IIRC, but this would have been at the CRANK.
I believe a stock unit, with some miles on it would be in the range of 68-70 HP at the rear wheel. Jetted, with a pipe should result in about +5 HP on top, 3-5 in the mid-range, so I would expect something like 73-75 HP on the dyno.