The Drive Belt Of Choice For High Performance! Each belt is crafted from only the best rubber compounds and tough Aramax cord. Carlisle belts enhance the efficiency of the variable speed drive system. Ultimax eliminates excessive friction and tension preventing drive damage. Exacting belt length tolerance minimizes system wear and avoids slippage. Available in 3 styles XS-designed for high horsepower sleds and delivers superior performance and longer belt life. Pro-a thicker cross section so more surface area contacts the clutch giving less slippage over a broader speed range for quicker acceleration and cooler running. Max-designed for general service machines under 500cc. Improved cog design for greater flexibility and cooler running. Applications: 1981 YAMAHA SRX440E 1984 YAMAHA VMX540G 1989 YAMAHA VMAX 1991 YAMAHA VK540 1992 YAMAHA VK540