Huh, you know, I thought I had progressive rate springs up front, but my suspension guy did all the ordering (I just picked out the purty rear shocks), so it might just have been springs rated for my body weight, but straight rate ones. I likely lost the paperwork when I moved back east, but maybe I can poke around and find it to know for sure.
I'm no suspension expert either. I'd guess those Race Tech guys know what they are doing.
2000 Kawasaki W650
2006 Harley 883R
2001 Ducati M750 (sold)