Belt Drive Limited BDL-PC-78-118 78T x 1-1/8" Wide Primary Drive Belt w/13.8mm Pitch for OEM on FXSB Sturgis 80-82BDL 78 Tooth 13. 8mm Pitch 1 1 8" Wide Primary Belt 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