I have a raptor 600(686) with all the goodies and there is no way it could ever do 140mph. With stock gearing the most I'll ever get is around 78mph. But if it's a drag race my banshee will come out on top. No matter what I do on the raptor the front will always stands up and thats where the banshee runs on it.And to bring the front down and run down the banshee it's not going to happen.So if you a good rider and the gears are stock on both bikes in 600ft it's a riders race.GOOD LUCK