Finally got around to cleaning the carbs. Than I got to thinking/reading other threads a couple of nights ago. My sled with the air box mod was working fine earlier in the year. Than I started to develop a miss or bog when I went on and off the throttle (WOT to mid back to WOT). This issue got worst and it wouldn't even rev past 6000-7000 without missing. Put the clean carbs back on raised the sled up and sled missing at 6000 or so. Close the door and turn off the lights in the shop I can clearly see arcing on the plug boots. I'm hoping this is my issue. Took the boots off cleaned them good and put some dielectric grease on. Wife had to run into town so I'll wait until she returns to install the newly cleaned spark plug boots. Hope this solves my problem.