Hello! I'm a mopeder in Portland, Maine. I've got an installed stereo on my 2000 Targa. I'm not kidding. I took some pictures of it. I'll post the link in the following post. It is an 80 watt amp with a car stereo. There are three speakers on the system . It is very loud and since I've been working on this for years, most of the bugs are worked out. I can post any information you need-- Wiring schematics, parts list, problems to expect and how to fix them. I did it on my 1978 express, but when I got the 2000 targa, I made a lot of improvements to the system. originally, I had a similar system on my mountain bike. I also had automative air horns on the same mountain bike. The horns I had are now old and clogged. For a time I had the air horn on my targa. A few times, that air horn made people see me when I felt that they were "blind" and were going to run right into me. This is not a troll-- I have the pictures and I will post the link.
I figure someone else has done this and might have even better design concepts than I do. If I did this one in portland maine, where I can only use it part of the year, some moped freak in Venice Beach CA must have a moped with an even louder system. Could this lead to a "Loudest moped stereo showdown"? Well, maybe not, but I can show you how to do this.
Let me know if there's any interest. I'll post the link to the pictures in the following post.