You don't have carbs. The DI is short for direct injection which is a high pressure fuel and high pressure air mixed together and added to the cylinders at the top. It is fuel injected with throttle bodies. Do not go messing around with the throttle bodies as they are very difficult to sync properly and factory settings are good for a lifetime.
Are you sure you have a 2004 xp? Is it red and black or black and yellow? If your avatar is your ski, it's not a 2004 and looks to be a 2000 which is a big difference. Last 2 digits of the HIN will tell you the year.