Did about 100 miles today, and the sled ran good aside from a few small backfires ( very small, just a small pop) after driving very slow <15 and having to feather the throttle for prolonged periods of time (15> min). During the ride my sled rolled over 100 hours of use, and after it did, when I would start it the LCD would read SErUCE for a few seconds, the. Go back to its normal reading. It was a really warm day about 38-45 degrees. Is this something I should be worried about? I haven't changed the plugs since I got the sled and I have no clue how old they are. I run 91oct, but had to add some 87 as it all they had at the trail store. What do you guys think the issue could be?