I purchased this drive belt after the failure of my stock drive belt with 2,100+ miles. This belt disintegrated after only 700 miles! Carlisle replaced it under warranty and I have yet to exceed the same mileage. Unsure if the failure was simply a manufacturing defect in that single drive belt but I expected to at least match the miles from the stock drive belt. Depending on life of replacement belt, I'm considering going back to stock drive belts.
Just bought two of these for my D&D 900 Firecat. Awesome belt! The stock 031 belts are strong, but too hard. The stock 020 belts are sticky, but not very strong. The Ultimax belt is much stickier than the stock 031 AC belts, but also way stronger than the 020 AC belts; Ultimax XS is perfection. My 900 is pretty hard on belts and the Ultimax XS has proven to be the toughest on the market. Thanks Carlisle!
This belt stunk. Lasted less than 1000 miles. I should have stuck with an OEM Yamaha belt, as my first OEM belt lasted over 2500 miles, and I ride my Nytro HARD. Stick with OEM. It's cheaper and MUCH better than this thing.