Im trying to i.d. the rear spring in my 98 cr250. Its blue with an orange mark. Problem is that the previous owner claimed he put a cr500 spring it it and I cant find any info on cr500 spring color codes. My 250 book doesn't list a spring with an orange mark and this spring is right at the standard preloaded spring length when un-sprung. Its 10.5 and standard is closer to 10 7/8. I have to put 1/2" of preload on this spring to get 3.9" of race sag and .98" of static sag. Seems im losing a good bit of travel with this spring. Prob best to go out and buy the right spring for the bike even if the rates are the same. Race tech rec a 5.2. Curiosity and parting with a hundred bucks is making me want to know what rate this spring is. Cant find anyone with a spring tester either. Bought this bike in 03.