There is a horrible amount of bump steer with the stock Zilla. I've heard of flipping the outside tie rod ball joints, changing the mounting arms for the ball joints, etc...

Well I thought I would throw up some measurements I made this summer of my front end.  I have the Camber mod on my 500, but I wanted to know where to set my toe at, so I started checking to see just how bad it is.

Here are some of my measurements:  12 3/4" travel from full droop to fully compressed (no shocks).  Initial measurements.... Measured from center to center of ribbed tire.

Quad only weight; Toe In set at 1/8 inch. 
42 1/8" Front of tire
42 1/4" Rear of tire

Full Droop (no shocks)
38 3/8" Front of tire
41 1/8" Rear of tire
2 3/4" Toe In

Level A-Arms (no shocks)
44 5/16" Front of tire
43 3/16" Rear of tire
1 1/8" Toe Out

Full Compression (no shocks)
40 1/2" Front of tire
42 3/4" Rear of tire
2 1/4" To In

3 7/8" toe range!

When you cycle the suspension with no shocks the Toe travel looks like this:

  /  \  Toe-in full drooped suspension
  |  |  Toe 0 moving towards level a-arms
  \  /  Toe-out level a-arms
  |  |  Toe 0 moving towards full compression
  /  \  Toe-in fully compressed a-arms

So, I wanted to cut down on the amount of toe out, so I set my toe in to 5/8 (.625)" under quad weight this summer. 

Anybody have a true fix for the bump steer?  I would like the Zilla front end to be like my Long Travel KFX450 Houser setup that is on my wife's bike.  It has almost no bump steer.

I played with flipping the ball joints, adding washers above and below the linkage arm, but never found a good sweet spot.  Different stem mounting points?  Different spindle mounts?

I should look at this again in the next few days again to see if I can reduce the toe out some more.

Any tips guys?