X2!
true, on the tight tracks, the fast Teryxs and Rzrs will be hard to beat, But they also have alot more that $1000 in their motors. This class is designed for all those old race rhinos sitting in garages that arent going to keep pumping money into single cyl motors, just to be mid pack at best. A class for people that want drivers skill to make more of a difference than money, have a blast for the least amount possible.
And I bet the R1 will kill all "rhinos" on any track, and will put down faster lap times than the 800cc pros on the big tracks like in the Lucas Oil Series. After watching them at firebird, go watch them at the Speedworld open practice, and see what they do there!
There are alot of people who have spent 30, 40, 50k on a race rhino and arent racing it because the motor options. This gives them another option, to dust off the old stuff and go run it.
The reasoning behing only 1 motor, is that they can require their engine mounts, and that keeps anyone from moving the motor forward to get better weight distribution, and I doubt they have the money and time to engineer and build 4 or 5 different motor combo mounts for a new class. You dont want to try too much at once, or it WILL fail. Make it as cheap and simple as possible, and it CAN work.
All my 2 cents of course.