i want to know what the fastest 4x4 is so I can out run my buddy on his grizzly 660. He is about to drive me crazy. I want something to make him cry when we get to the finish line.

Mitch,

 

I own a 300EX but I don't think I can outrun him on it. Even though it is pretty fast.

 

Stock, the 650 may be the fastest. Modified, there is nothing close to the Scrambler 400 4X4.

 

Modify a Scrambler 400 4x4 for less than a prairie and you will beat him. 2 strokes rule!!!

 

Either a 500 or 400 Scrambler should out run any utillity 4x4.

 

The 500 is questionable and I do not think a modified 500 will beat a modified 650. The 400 is without question the fastest if modded.

 

Fastest 4x4, Well Its Mine and you can not have it LOL. Build your own