Ski-Doo recently announced several driveline changes for their 2018 models. Changes to these 2018 models include;
* Finned fixed pDrive sheave – (improved heat dissipation and cooling)
* Revised CVT Calibration – (improved belt traction, less heat generation)
* New drive belt – (longer lasting, better heat resistance)
* New gearing (Summit and Freeride only) – (improved performance, better efficiency)
* Revised PTO and MAG engine mounts – (reduce engine movement, improved alignment)
* Better cooling in CVT compartment – (reduced clutch and belt temperatures)
* New Clutch cover and improved air flow – (reduced clutch and belt temperatures)
These changes should result in the drive belt operating temperatures dropping between 15 – 40 degrees C (27-72 degrees F).
While the majority of 2017 850 E-TEC owners have had no issues, Ski-Doo has indicated their 2018 850-equipped sleds will have the changes listed above to address concerns (with drive belt durability). Most issues have been with Summit and Freeride models. They also indicate they are still looking into the issue for 2017 850 E-TEC owners who are experiencing drive belt issues.