Replace your Keihin CR carburetor o-rings with only genuine Keihin parts.  The Keihin 16173-001-0040 drain plug o-rings are made to higher standards and ensure only the best quality.  The Keihin o-rings are made from a rubber polymer that remains pliable even after many years of use and ensures an exact fit and proper function in all conditions.  This o-ring fits all Keihin CR26-39 carburetors using the 16173-001-0040 drain plug o-ring.  Keihin OEM #16173-001-0040. 


The o-ring measures 18.50ID X 2.85mm thick.