When removing and refitting your carburettor, it really is worth replacing the gasket every time to help avoid air leaks. At best they can affect the running of your Honda, at worse your machine could run so weak it burns a hole in the piston! Genuine Honda parts will do the job, no questions or doubts, so why bother using cheaper Far Eastern alternatives? Did you know that CMS probably stock more genuine Honda [parts for these types of machines than anywhere else in Europe?