80cc spring rate


Can someone tell me what the right spring rate would be. 98 YZ80,13yo 115lb intermediate,riding MX/SX tracks. I would like to err on the side of stiff as he will only get faster and heaver, and this will be the last mod for this bike as I think he will be ready for a 125 by next fall. My Guess was 3.1 fork, and 5.2 rear. If your out there Jeremy I was wondering if you could tell me a little bit about PDS here in WA.as I am thinking about having them do the valving. Thanks.

Jeremy Wilkey

Owner, MX-Tech
A .31 5.2 combo will work just fine but might be a tad on the firm side, however it sounds as if this is what you want. I'm sorry but I don't plug my SA's or my own business on this board. Drop me a personal note and I'll be happy to elaborate.