I have a 2002 ProX 600 and I recently went through the rear suspension; had the shocks rebuilt, all zerks greased..etc. I set the clicker shocks to the stiffest setting. I also set the block in the back of the suspension that controls the stiffness of the springs to the stiffest setting. I rode it for the past couple of weeks and the suspension doesn't spring all the way up. When I get off the sled, I lift the back of the sled and it goes up 3 or 4 inches ... but doesn't stay up. It seams like the springs are very week. I'm a pretty big guy - over 6' and weight 225lbs. Also - If I ride hard, and hit some rough terrain, the sled bottoms out. So my question is do springs actually go bad? Do they weaken? Should I consider buying some stiffer springs? If so - any recommendations? Appreciate any help. Thanks!