2006-2008 Polaris Snowmobiles FS/FST Service Manual., Page 173Get this manual
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Final Drive and Brake Systems FINAL DRIVE GEAR RATIO
Top Gear Bottom Gear Chain Pitch Gear Ratio 26 39 78 1.50 25 40 78 1.60 24 44 80 1.83 24 40 78 1.67 24 41 78 1.71 23 46 80 2.00 22 46 80 2.09