At 1/2 the cost of the OEM belt I am trying these this year. I have heard great things about them. SKS uses part # 377288 or gates # 44C4553 which is the same size as the 1115 or 1183 Polaris belt.
http://www.gobigparts.com/GATES-G-FORCE-C12-CARBON-DRIVE-BELT.html
Gates all-new G-Force C12 belt: a revolutionary breakthrough in CVT belt design. The first belt of its kind with a carbon tensile cord for exceptional strength, flexibility, durability and performance in the most demanding off-road conditions. Engineered for drop-in performance for ATVs, UTVs, Side by Sides and Snowmobiles.
Minimal stretch with extraordinary strength under load results in consistent shifting RPM
Allows for maintaining peak power throughout the shift curve
Wears evenly to reduce belt failure due to edge cord pullout
High performance neoprene with a trapezoidal top-notch and rounded bottom cog design maximizing heat control and flexibility
Carbon tensile cords are bonded to aramid fiber loaded rubber with specially formulated adhesion gum resulting in increased side-load resistance, preventing belt distortion and edge cord pullout
Gain optimal power transmission for faster acceleration, improved throttle response and consistent shifting performance
http://www.gobigparts.com/GATES-G-FORCE-C12-CARBON-DRIVE-BELT.html
Gates all-new G-Force C12 belt: a revolutionary breakthrough in CVT belt design. The first belt of its kind with a carbon tensile cord for exceptional strength, flexibility, durability and performance in the most demanding off-road conditions. Engineered for drop-in performance for ATVs, UTVs, Side by Sides and Snowmobiles.
Minimal stretch with extraordinary strength under load results in consistent shifting RPM
Allows for maintaining peak power throughout the shift curve
Wears evenly to reduce belt failure due to edge cord pullout
High performance neoprene with a trapezoidal top-notch and rounded bottom cog design maximizing heat control and flexibility
Carbon tensile cords are bonded to aramid fiber loaded rubber with specially formulated adhesion gum resulting in increased side-load resistance, preventing belt distortion and edge cord pullout
Gain optimal power transmission for faster acceleration, improved throttle response and consistent shifting performance