Modern Vespa

OK, my horn is getting wimpy. My G TV has an air horn and I don't know what kind it is as it was with the scooter when I bought it a few years back. It wasn't that strong then but now it sounds like a very sick cow with asthma. I was wondering if there could be anything besides the horn that might cause this issue? Otherwise I guess I will just replace with one of the Siebel airhorns. I had one of those on my Majesty and it worked great the entire time I had the majesty. Any thoughts? Thanks in advance.

Just a general comment on horn "loudness", i.e., decibels. If you read a bit online about decibels you'll see that as they go up it is not a linear increase in sound level. Thus, by understanding sound you'll better compare the horn choices available. In the past i've used the readily available loud horns as sold by AP's box stores like O'Reilly's. Amazon/ebay too. Much easier to fit onto a scooter.
Honestly, I find that my GTS horn gets folks attention.

I had same problem, cured it by cleaning the electrical terminals

The terminals on the horn? ...or the relay? If I get in there, I will do both but I am just curious what you found.

I just did the ones on the horn had lots of build up on them due to the weather is say

Thanks