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Havey Smith did a nice 4 page article on the restoration of horns from the late 356 and early 911. I took mine apart and they were like new inside, so a cosmetic makeover was the only thing I had to do. The horns had beed sitting for 20+ years so I didn't expect them to work before I took them apart. When I was all done........nothing, not even a grunt! Has any one had experianced the insides of one of these early horns?
Sorry Rick...mine honk, and I leave them alone. But a thought. Instead of looking through automotive sources for a rebuild? Think speakers. Horns & speakers work on the same principle...so maybe? (Just had my ancient JBL home stereo speakers rebuilt..and it worked out well.)
I give up! 69 horns will be used!
Rick,,,turn the adjustment screws in and out a few times,,,, it usually helps... if not,,,,,,,,,,,,,, carefully pickup up the horns with your right hand,,,,turn around,,,, then carefully walk over to the scrap bin and toss them!!!
Robert..
I'm with Robert,
Fiddling with the adjustment screws has always worked for me...
I've enjoyed playing with the early metal Bosch or Klaxon horns that BMW bikes used.
My oldest one is an early Bosch (very similar to a 356 horn if not the same) on a 1955 R69 and wouldn't make any noise before I started on it. I took it apart and found a bad connection and improper postioning of the electromagnet.
Put it all back together and after a bit of tuning (there are 2 places to tune it) the thing works fine. Not the prettiest sounding horn in the world but it does work. With some fiddling I'm sure I can at least make it into a good tenor.
Best of luck,
Tom