the spring has no numbers on it. All I can tell you is the spring is black, wish I had more! I could take it to a local susp. shop and they have a spring' o-meter!
Your black spring is probably an LTR you have to take it off the shock & look at the ends of the spring to read the rate number .It's possibly a 5.4 kgm .you may want the 4.8 at your weight depending on your ability and whether you carry a fanny pack of tools & camelback or back pack you may be better off with the 5.0 kgm.I would recommend calling Les at LTR for proper set up of your suspension .The prevoius owner may have had both ends valved for a 200lb rider . www.lt-racing.com