From the September 2012 issue of SnowTech Magazine
2013 Polaris Pro-RMK models feature an all-new belt-drive system that replaces the traditional chain and gears in the chaincase. Officially called the QuickDrive Low Inertia Drive system, it is the first belt drive system in an OEM production snowmobile. The complete system – lightweight brake, extruded drive shaft and maintenance-free belt drive reduces sled weight by more than 6.5 pounds. Polaris claims this provides a 21% reduction in rotational inertia for enhanced efficiency and acceleration. Getting rid of this much rotating mass cannot be overstated – even if the mass is not that far from the center of rotation, it will allow the sled to spool up quicker, which will provide even better response and acceleration, maximizing the available power and getting it to the snow even more effectively. According to Polaris, this amounts to the rider being able to apply five pounds less of force to get the sled to do what they want it to. The belt drive pulleys are nickel-plated for wear and corrosion resistance.
Originally published in SnowTech Magazine’s print version. SnowTech is published 5 times a year and is available as a subscription here, or available on your local newsstand.