Just did the JamesNow. Put it in fired it up, 2 minutes tops two large backfires and stall. Will not start again. 155 mj stock everything else 2nd clip pos. 1.5 turns out on fuel screw 900ft. Took the mod out, still won't fire. Its getting fuel, small slice in the plug wire rubber, appears ok. It still pops like it wants to fire so im sure its getting spark. Any suggestions greatly appreciated. Have been running the above jetting for about 2 years and it runs good except for the bog. I know its on the lean side, im not that aggressive of a rider.