When thinking of anything carb related one name that comes to mind for many is Mikuni . They offer replacement carb tops to meet and succeed your needs. This carb top is intended to be used in conjunction with HSR42/45 carbs. Brightens up the top of your Mikuni HSR series carbs with chrome Chrome top cover has the Mikuni 'M' and HSR logo on the top Cover includes mounting hardware and a fresh gasket