Artic Cat 98' Panther 550 Deluxe 1 cylinder dead any ideas?

I HAVE A 550 ENGINE THAT ONLY RUNS ON ONE CYL, THE MAG SIDE.CHECKED COMPRESSION,OK AT 130 PER CYL.HAVE SPARK AT THE COLD CYL. HAS FUEL AT THAT CYL,PLUG IS WET AFTER RUNNING FOR A MINUTE.CDI IS BRAND NEW,COIL IS NEW. CHANGED CRANK SEAL ON THAT END.STATIC TIMING IS OK.NEW THROTTLE SWITCH. PULLED BOTH CLY. AND CHECKED CRANK WITH DEGREE WHEEL THAT WAS OK.HAVE ABOUT 7-10 LBS VACUUM AT FUEL PUMP OUTLET. WHAT IS LEFT? AT WITS END ON THIS ON.!!!