I am not a suspension guru but I know when it doesn't work. I am just returning from a ride in the U.P.. We had two new xcrs, one new mxzx, and one 19 mxz xrs. I rode them all. My and my nephews xcrs bottomed excessively. Buy the end of the ride I had my rear shocks as stiff as they could go with springs set on high. I am 200 lbs. We do ride pretty hard so we are hitting the random wash outs at a pretty high pace. I felt my toe nails go through the top of my helmet more times than I can count. It also did horrible on the stutter bumps. Nephew had pretty much the same results. When I jumped on the ski doos they performed WAY better. What the hell am I doing wrong and how do I fix it?