I own a Suzuki Hayate and I’ve successfully installed a Bosch Horn on it. I would recommend every motorcycle rider to have this Horn. It best fits my needs in terms of overtaking a truck or a deaf SUV. If you wonder and ride on the cities like Manila you probably need this Horn.
I have here the instructions on how to fit such snail horn on your yamaha mio or honda motorcycles. Using a relay would really be a must and I have also here the diagram on how to install it by yourself. If you don’t have any idea about electricals I recommend get a motorcycle electrician to do it for you.
Picture courtesy of http://www.miata.net
I’ve been using this Horn for my suzuki hayate and its suit best my needs. Hope I have helped you out with this one. Send a comment if you have questions.