I am new here not to forums I frequent the diesel forum scene mainly however I seek help from the gurus on here. My story is bought a brand new 2015 650xt loaded around Christmas broke it in like I break in my diesel engines loaded and ran hard and varying rpm first 5hr gray key for sake of the belt then went to black from then on. Took in for 10hr service they said all looked good except 4 bulbs out not under warranty :th_smiliepissed:. Now I have roughly 130mi on it roughly 30hr never sunk in the mud mainly trail riding and creek crossings deepest 1ft have had it ran out to 70mph once or twice also but only after it was warm and ran some before. I also have only run high test ethanol free gasoline since day 1. I noticed Friday night when I fired it up to go riding with some friends it stumbled like a miss cutting out and spitting when I tried taking off or revving in neutral. I finally got it revved up to about 4000 in neutral held it there a minute and it was fine the rest of the time. It has since done this 2 more times and warranty was up a month ago I am fairly sure. So I am here now looking for answers as I came from Honda machines so this machine is new to me. Thanks:th_smiliewavey: On Edit I think fueling issue the pump etc any help appreciated.