Introduced on the MXZx 600RS race sled in 2016 and then expanded deeper into the Ski-Doo lineup for 2017, the pDrive primary clutch is a smooth-shifting, low-maintenance unit that in many ways matches the supreme attention-to-detail found on other parts of the brand’s modern, refined snowmobiles. Here, Snow Goer Contributor Jeff Oberg shares how to adjust the clickers and change the weights. He uses a 2018 Ski-Doo Summit X 850 E-TEC in this example.