Replace your FCR series carburetor top cover gaskets with only genuine Keihin parts.  The Keihin 1031-806-2000 (FCR35-39) and 1031-807-2000 (FCR41) top cover gaskets are made to higher standards and ensure only the best quality.  The Keihin cover gaskets are made from a unique paper compound that resists gasoline and elements even after many years of use.  They ensure an exact fit and proper function in all conditions.  The cover gaskets fit all Keihin FCR series carburetors.  Keihin OEM #1031-805-2000 (FCR28-33), #1031-806-2000 (FCR35-39) and #1031-807-2000 (FCR41).