I like to go close the Ski-Doo's recommendations. In the middle of the track you should have about 1-1/2" of free play in the track with a small amount of force. I believe the manual says take the measurement when applying 16 lbs of force. To measure, I push the track up to the bottom of the hyfax and measure that, then push down lightly and when I can push it down about 1-1/2" that is where I set it at. Check the tension again after riding awhile if you have a new track.