My 2015 Sportsman 850 SP has 43 HRS. on it so it is almost through the break in period. I was at the trail ride this weekend and it was smoking a little, but what was strange was it was in the same spot on the trail every time. When I ride the trails its usually with a group of about 5 to 8 machines. On this trail in the beginning we really didn’t get to speeds of more than about 5 to 7 MPH. Once we reached the hills and I needed to get on the throttle to climb is when it smoked. After that the speeds get up to about 10 to 12 MPH and no more smoke. I do not sink my machine nor do I bury it in mud any deeper then the top of my foot rest. My machine is stock for now, but plan on doing a couple of MODS. One of the guys I ride with said that he thinks the valves need to be adjusted. Is this something that is common? My warranty hasn’t run out yet, will they do that under warranty? Thanks for the help in advance.