I purchased an 800 Dragon with 2600 miles. Carl's Cycle in Boise totally rebuilt the engine at 2200 miles (new pistons, rings and crank). The sled cuts out between 4600-5000 rpm. After 5000 rpm, it runs great. I've had the TPS set, new fuel filter, rebuilt the clutches, checked the power values, checked for leaky intake boots and it still does it. Annoying when trying to ride thru the trees. Anyone experience a similar issue? If so, were you able to fix it?