The bike has grunt and torque, and it is a fast 350, or a slow 450 in speed. Unless you rev it, then it is like a fast 450. How? Well, it gets traction. And because it is hooking up it isn't spinning and it is going forward fast. And when we say rev, we mean it, the thing sings to 13,000 RPM and we were hard pressed to use all the juice or hit the rev limiter, if there is one.