wr450/yz426 fork spring guage/diameter

is anybody able to tell me the thickness of the spring used in the standard wr450 2003 forks. i just pulled out the springs and they measured 4.8mm where as the fork springs i pulled out of my yz426 measure 5mm. i'd like to use the standard wr450 0.46kg/mm springs but have no idea how to work out which one i have

I have a set of fork springs I was told were stock, I'll try to remember to put a caliper on them tonight. I'd count the number of turns as well, more turns means softer (for equal coil diameter, wire diameter).

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