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A horn of very good quality then what it is mounted at the YAMAHA factory on BOOSTER, BW'S, SPIRIT ... approved which can be adapted on most of the 2 wheels machines.
In order to replace your old worn out part, out of use ... Here is the horn or horn marketed by YAMAHA.
Connects to 12V, E3 approved. It is installed on booster, speedfight, sr50, nitro or other uses ...