First, make sure your track runs straight. Then find a long straightedge to lay alongside your track, extending under the front of your sled. If you can't find a straightedge, you can also use an 8' flourescent bulb. Measure each side from the wearbar (assuming they arent bent) to the straightedge. Measure from the rear of the wearbar, and from the front of the wearbar, and adjust accordingly. On the pro, you may need to remove the pipe to access the inner locknuts on the tie rods. I will also add, it is easiest to take tiedown straps and lock your bars to your rear bumper. Measure the length to make sure the bars are straight. It is nearly impossible to get the skis straight without bumping something, and locking the bars will help to make the whole process easier.
