The S50 horn is, well, .. from a Japanese motorcycle. It doesn't blow, it sucks.
Easy fix, go to Pepboys and get a Fiamm. Worked wonders on my Honda (mmm, dual horn now), and it looks like it'll be east to get to the existing S50 horn. Then the hard part: the bolt stem on the Fiamm just isn't long enough to get through the grommet where the stock S50 horn goes.
Anyone have any success getting an alternative horn mounted? Any vibration issues by using the bracket that Fiamm gives, and a different bolt that is long enough to attach the Fiamm bracket to the Suzuki rubber grommeted bracket?