My sled was running terribly on the top end of the power band. Long story short. Thought it might be a plug, changed them, still didn't work so i took it in thinking it might be the rave valves. They told me they won't cover that on warranty as it is a maintenance issue. Any one else run into this at their dealer? To me, if you have to take your sled in to be put on the computer to adjust to the valves after they have been "maintained" it isn't exactly something that can be done at home. Or am i crazy. $400.00 to get them cleaned and new gaskets by the way.