We have a 2014 base LTX model which I believe is the equivalent of the 2015 LTX DX. I weigh 285 fully clothed and found that there was plenty of adjustment in the rear suspension. However, I have the Yamaha 4 position spring adjuster. At the start of the season I was on position 2, as the shocks broke in I moved the shock to position 3 and that is where it is now.