Although it is a roller/roller/roller design, servicing a Ski-Doo P-Drive primary drive clutch is still very important. There are limited parts to wear but you still need to visually inspect for wear and keep it clean. This video tutorial can help you do so.
Steve Martin is a well know snowmobiler and racer. In this video he takes the time to list the required tools, how to remove the clutch easily, what to look for, and calibration differences between model years. Thank you Steve for the tutorial.