HOT ROD SLED SHOP GEAR & CHAIN KIT FOR SKI-DOO 900 ACE TURBO 2019-2020: The oem bottom gear and chain are 45t- 108 chain. The HRSS BIG MPH Rexnard kit includes a gear and chain for the 900 turbo to gear the monster up. This works well with 195-215 hp flashed sleds. Typically they gain 5 mph with the 43 , 7 mph with the 42 combo and 8-9 mph with the 41 combo. 11-12 mph with 38 combo. The chain takes some of the dogleg out of the stock chain for more efficiency. NOTE: some sleds can fit a 104chain with 41t bottom gear but some do not (all kits now shipped 41t-106 chain unless customer specified differently in notes at checkout). PLEASE NOTE THAT SOME 2021 REV GEN4 & WIDE BODY MODELS HAVE A NEW DESIGN BOTTOM GEAR AND THESE WILL NOT FIT.
2021 gears can be purchased separately!