I have riddin all of them but the outlaw. My dad has a scrambler 500 and it gets up and goes for a tank and it is bone stock. An old co-worker of mine had a 400 one that he had some money invested into it and it would run great at the track. The predator are great trail and gncc quads. They are light weight and have some power, they could use some more. The outlaw 525 has a KTM engine, enough said.