My buddy and I are new to sledding and just picked up a couple of new XP's...., I got a SummitX 146 and he got a 154. I had only one day of riding in my life before this...., on a beat to death 03 Cat rental. Even with my limited expierience I noticed right away that there seemed to be alot of what seemed to be track vibration/noise, It was the feeling of the track slapping hardpack, but in powder! After riding about 10 miles I concluded no way could this vibration/noise be normal...., asked my buddy if I could try his 154 out, night and day difference! My dealer is a couple of hours away, so at first I just figured, "no big deal it has a warrenty, I will take it in for the suggested 10 hour maintenance interval and mention it then, probably just a miner adjustment" figured I could save a trip. I now have a second ride, where my gas gauge failed by the way, with a total of 50 miles, mostly trail, all easy, and it is getting way worse, there is no way I am riding this thing again without figuring this out. I am hoping this is just something miner I could maybe just adjust myself...? save a trip to the dealer. I am super frusterated with Doo for not realeasing the service manual for a given model year until Feb-Mar of that year, makes it tough for a newbie like me that want's to learn to work on his own sled. Sorry for the long rant, I went the brand new route because I want to ride, not tinker, and this is what happens, not one fully functional mile yet. Any Ideas/advice would be great, I would hate to go to the dealer for something I could do in the garage in an hour, geuss I'll be going monday if I dont figure this myself, thanks again, i know i will be all soon, THINK SNOW