-Remove solenoid from the dpm manifold and tie up somewhere out of the way, leave it plugged in though as this will stop the replace engine soon light from coming on.
-Use a piece of hose to connect the vaccum sources of both carbs together (where it is tee'd and connected to the dpm manifold)
-Vent the bowls to the airbox to keep everything balanced, and jet accrodingly!
The race manual the dealers have the Xp factory hillclimb race sled is jetted at 400 and the Xp800 drag sled is jetted to 380. I would start higher and work down.
