I recently revalved the shock on my '00 KLX 300 and dropped the spring rate from the stock 5.8 to a 5.4as recommended. I can't get the 85-95 mm race sag that is called for. I can only get about 70 mm with no preload on the spring. Is there a rule of thumb on how much more sag I can achieve with softer spring rates i.e. a drop of .2 in the rate will deliver 15 mm sag, .4 30 mm etc.? It would be nice not to have to keep buying springs 'til I find the right one. Also, if I increase the spring rate in the forks as advised, will this shift more wieght to the rear producing more sag? I weight 150 and ride CA trails and some dessert. Thanks