2S4L, does your rear spring have any identifiable markings on it? If so it will help id the current spring rate. My '00 has WP front also, it came with .42's. The rear was a 5.1 stock. I am in the 275lb range (nekkid) and had LTR revalve my suspension. I went with 5.7 rear and .46's front. It worked much better after having the revalving done (I used the new springs for a year before sending them out). But, I rarely race and wish I had gone one step lighter front and rear though they work great when I'm doing single track through the woods hitting roots and rock ledges (chasing my faster friends). Whoops also work out much better, not near as tiring. Good luck.
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jeff
'00 XC250 (mine)
LTS front and rear suspension, power valve cover, carb jet kit and rear chain glide, RB Designs head mod, BRP tall triple clamp, backyard foot-peg lowering conversion.
'04 EC250 (the kids)
(he can do his own mods haha!)
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