dopp
i am no suspension expert by any means. i learned about re valving from totally yamaha site. When i first rode my apex, it was soft on the hardest setting. i am probably 250 all suited up i am guessing. sure, the spring will make a difference, but the shock is by no means ready for a big boy spring. going to ruin the shock i believe is what they told me. Carver performance suggested just re valving it for a small fee. (got to pay the shipping and handling) Did it make a big difference. I don't bottom out any more, unless i come down HARD. they set it to your weight and how you ride is the best part.
give them a call, they can explain it better