I doubt a stock 1000 DS or 1100 for that matter makes 100 RWHP. Mine was one of the best running ones and it made 92 with the airbox lid intact, back when it was fresh that is ;) slip ons, power commander, high flow breather. The 1100 makes maybe a little more.
Comparing any of the Bimotas now racing in ccs (except for Mavros's) to stock bikes is about the same as comparing your chevy malibu to a NASCAR cup car. One of the Motocorse Bimotas has a $50,000 wiring harness. No I'm not kidding.
Those bikes are built to the rules and are fast, and are not racing in SuperSport. I think the rules as they stand are pretty good, with ULW now allowing SV's.
As far as ULW, I wish I had my old 750 back, yes it was a 5 speed but I never thought that was a big deal- 350 pounds even with that big old steel tank.....I sometimes wonder how fast I could go on that bike now if I had it back....but man, was it ancient!