You need one flash killer for each side of the motorcycle (2 flash killers for one motorcycle). The flash killer ensures that the indicators on one side of the motorcycle are operating in the same frequency. Moreover, it ensures that there is no "defective bulb" error message in the speedometer.
Catarifrangente rosso, auto-adesivo con E-mark...
Sono disponibili lampadine arancione o con rivestimento...