A proper break-in of your drive belt will ensure a longer life and better performance.
To break in a belt, use low gear (if available) while varying speeds and avoiding wide open throttle for 5 to 10 miles. If no low gear is available, vary at moderate speeds while avoiding wide open throttle for 50 miles.
Breaking in a belt is about more than a set number of miles and avoiding high engine RPM. It's about flexing the belt in the correct direction. The side faces need to wear and mate to the proper angle of the sheaves and wear into the correct friction. Cut belts are too sticky, while ground belts are too slippery when new. That wear needs to happen under low load and temperature. Belts run hotter when first installed are more sensitive to high loads until they break in.
The goal of break-in is to achieve a high number of flex cycles under low load while maintaining low temperatures.
Even with a proper break-in, it is possible to damage a belt with excessive heat or spin-burn. Many belts are damaged because of spin-burn or hour-glassing, which is a result of not using low gear when tires are stuck in mud or sand or when loading or unloading your vehicle.
Polaris recommends using Polaris belts, which are designed and tested specifically for Polaris Off Road Vehicles. See the following video for more on why we recommend Polaris belts.
If a belt fails, always clean any debris from the PVT intake and outlet ducts and from the clutch, clutch covers, and engine compartments. Verify the clutch rollers are tight and rolling smoothly and the weights are not notched or loose. Ensure the seal on the clutch cover is in good shape, not twisted or torn, and installed correctly.
When installing a new belt, make sure it is oriented correctly. When the belt is on the vehicle, you should be able to read "POLARIS" and the part number as shown below:
All break-in procedures for your vehicle can be found in your Owner's Manual.