Main reason is to actually be able to ride them. Banshee were awesome for the hills, but that was it. Kinda sucked having to run 10+ dollar a gallon fuel and burn through a tank in no time. It would be nothing to burn through 100bucks of fuel/oil in a weekend with little to no actual riding. And quite honestly, they sucked to actually trail ride once we build them for the hills.
Last weekend i rode all day on 2gals of fuel with the raptor. Hard to beat that.