i wasn't happy with the stock horn (on any bike i've owned for that matter). on my Valkyrie i installed rivco air horns under the swing arm a few years back. these are about $120 US, & too large to tuck under the Savage. sooo, i found a set of inexpensive ($25 w/ shipping) air horns on ebay. compressor & relay included. small enough to install the horns & compressor under the bike, nearly out of sight ( you'll see 'em if  ya know to look). VAST improvement! since i'm setting this scooter up for a mewbie (my wife), i want all the safety i can get.
if yur interested, i found out the same horns are available at Harbor Freight Tools.