All rubber items will perish and degrade, from U.V, temperature extremes and general wear and tear. Fortunately Honda keep on producing new parts, allowing you to fit with complete confidence, and ensuring your fuel tank is ventilated correctly, and does not spray petrol where it is not wanted, over the rider! For more consumable items like these try browsing our online catalogue, you may find all kinds of parts that you thought were no longer available.
