pressure springs

[confusedtech]

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

 

[whenfoxforks-ruled]

http://www.mx-tech.com/?id=spring_generator Pressure springs???//Oh fork springs,we have not done much research on this subject!