Drive Belt - Ultimax XP - Yamaha Each belt is designed for a specific demanding application to handle heat, load and abuse, Specially formulated heat resistant, fiber-loaded polymers are engineered for performance, Aramid cord provides outstanding strength and durability, Extensive lab and field testing under extreme conditions assure performance and long belt life, Innovative design is strong but flexible for cool, efficient operation, Tenacious gripping power during the highest levels of torque, Quick and consistent throttle response, Robust acceleration at high RPM, 3-year warranty