Hello mate
before christmas !!!! i used to weigh around 185 lbs a little over that now i had my shock set to 185 psi and liked the feel, quite firm though but suited my riding, when i got my shock serviced at mojo they set it up for me and had it pumped to 165 so anywhere around that should be good, best bet is to ride and take your pump with you, if the trail is not to rough go for the harder pressure as the bike for me tend's to ride soft in the rear. i now have a bted linkage fitted to match my forks travel 125 front 130 at rear and have to pump that to around 265psi.