I ‘m having trouble setting up the rear suspension on my ’97 ZR 580. The problem I’m having is bottoming when coming off jumps and at the bottom of drop offs and hills. It is fine on small whoops but terrible otherwise. I have tried all preload settings and have the springs set to the stiffest setting. It doesn’t kick back, just bottoms hard. I weigh 218 lbs.
The shock valving in this sled is set more for Mr. Average Trail Rider than the ZRs used to be. And, Mr. Average Trail Rider weighs more like 170 -190 pounds. I have the same problem, and needed to revalve the shocks in the rear. Any Fox Shock rebuilder can help you do this.