The 2017 Skidoo 850 models come with the P-Drive primary clutch.

We have the following options available for this primary clutch:
The following springs are load tested as a “ Assembly with guides* @79.4mm, and @45mm“
As an example, BRP list one of the 850 stock primary springs (417224168) as 150/350** in this method and list it as BL/PL (Blue/Purple).