pressure springs

Joined
Jul 26, 2006
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#1
I am replacing the fork springs in my sons 04 crf250r. I am putting.42kg springs in. He weighs 130 and rides mostly motocross. What pressure springs should I go with? The best I can figure the stock springs are 1.9kg but I havent found anywhere that tell what to use like it does for the actual fork springs. Thanks for any help
confusedtech