2005 WR450F I just changed the springs front and rear (RaceTech). here is what I have. Type of Riding: Desert / Enduro / Trail Rider Weight: 215 lbs Recommended Spring Rate: 5.64 kg/mm (use closest available) Stock Shock Spring Rate (measured): 5.3 kg/mm (stock) Available SRSP 6228 Series Springs are: SRSP 622856 RT SHK SPR 63.4x60.6x270 5.6kg The spring I installed in the rear is a 622856 (stamped on it) which is perfect for my weight according to RaceTech I installed the shock with the collar screwed to about where the stock spring was. I measured race sag and came up with 3 1/8 inches - I am striving for 4 1/8 inches, which is about 105mm sag. I unscrewed (raised) the collar which made the spring slightly longer, well my race sag is STILL 3 1/8" . How is this possible?? What am I missing?? I did the sag test with me on the pegs, sitting on the seat and even sitting back farther to no avail.... Any thoughts?