Kuryakyn (9975) 1-1/4" Breather Bolt Since 1989, Kuryakyn has been the world&#39;s leading provider of innovative and stylish bolt-on chrome parts and accessories for a wide variety of motorcycles. From Harleys to Hondas, Kuryakyn has something for everyone and has now expanded the product line to include sport bikes and many others.Replacement breather bolts for the Kuryakyn Crankcase Breather Kit.Sold as a pair.Note: Kuryakyn part number: 9975.