BDL Primary Belt Features: Kevlar belts are thermal, chemical and wear-resistant for longer life Kevlar is used for added performance in various racing competitions around the world Over the years many other uses have become common such as reinforcement in rubber goods for mechanical applications Kevlar enhances the compound's mechanical performance particularly at high temperatures 13.8mm Belt pitch OE standard replacement belt is 78 tooth and 11/8 wide Replaces OEM 40009-80