Use some quick setting epoxy to glue a thin strip of aluminum around the inside of the air cleaner ring- - - - -or the air horn. Several thicknesses and widths are available here:

www.ebay.com/itm/397261364881?

Your friendly local convenience store also sells aluminum shim stock in handy, portable 6-packs!

Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!