I just recently bought a 90 kx500. Just had the shock rebuilt. When I pulled it from the bike i noticed it had an eibach spring but the numbers were not legible. They were half worn off. I havent had a chance to ride it yet,(20 degrees and snow), but it seems like it sits a little low in the rear. I have about 2" of free sag. What would cause it to have too much free sag? Too soft a spring rate? The pre-load is almost all the way down, does that make it have too much free sag?