i searched the threads on here and they all relate to 09-10 xp850's mine is a 2011 with 10hrs on it. its been rode in temps from 20f-65f. it has always started easy but puffs alot of smoke then runs rich until warmed up. i just pulled the plugs and although not terrible they weren't perfect either. if its 20-25 out side and i start it it will blow black smoke then it lightens up in color. after a minute it stops smoking. it never stalls but will back fire once in awhile. im ready to give up and drop it at the dealers. my t-cable is smooth, the air cleaner is clean, and exhaust flows free. any suggestions?