top end drops on the 450 by about 4-5 miles an hour with the clutck kit installed on stock tires. with the pipe, filter, and jet kit it gets almost all of that back. So I think if you did all of that then added the taller tires then you would only be down a couple of mph from the tires.

 

2FAST4URASS, honestly Im very happy with the low end power of the wolvy. Its actually quicker out of the hole (from 0-20ish) than my buddies grizzly 700, and faster than my 440ex. But the honda is a bitch to launch on solid ground because it pulls the front end up so hard. The bruin on the other hand is a different story, like you were describing with the deep mud, once you get in it and stop, good luck getting the tires spinning again. It is gutless from a stop.

Mud Hog, Im 245 lbs and I have never had a problem with the power of the wolverine. Im not saying more power wouldn't be nice, but it has pulled my big *** up every hill at the dunes without a problem.