In modern and hectic traffic a working horn is a real safety feature. The inner parts of the horn suffer from corrosion by the years.
With this spare part you can recreate the like new status.
Good fit and easy to install.
AC / DC?
AC = alternating current = AC = buzzer
DC = direct current = DC = horn
Many old vehicles without battery use as a AC power supply. This ones can only be connected to so-called buzzer-horn. These may be identified by the falling pitch depending on the engines speed.
Due to the non-constant frequency buzzer, sinc e the early 1980’s most German bikes have have been equipped with a battery and a DC electrical grid. This allowed to install real DC horns, recognizable by a constant pitch, regardless of the speed of the motor used.
There are some exceptions in which, despite AC electrical system, a DC horn was used. Piaggio used from year 1984 and later (with the introduction of Lusso/EFL series) special horn rectifier.
The AC Power supply is converted with a special, only for the horn, rectifier in DC. This rectifier can also be fitted on all vehicles with 12V AC electrical system, to fit a DC horn.
NOTE: Almost all German Vespa PK and PX models require a horn (DC).