hey all, i know someone on here has a 13t sprocket on thier 450, i just bought one today for it, and i was wondering how much top end itl take away....after all, i still gotta keep up in the open fields with a raptor, a z, and a 400ex

 

you will not have a problem with the z and 400ex but the raptor will be a little closer. It will out run them easy in every other kind of race. It will not lose very much top end.

 

4-5 mph