Amazon.com: Stator Plate for 50cc Engines for Aprilia, Derbi, Gilera, Piaggio and Vespa, 6 Coils, OEM Part Numbers 639865, 584525, 827849, 830296, AP8515105, 246350072 : Automotive
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Technical sheet of the scooter Derbi GP1 50cc (3-2001) - 2003factory.com
Amazon.com: Malossi X-K Performance Belt for Vespa GTV Piaggio MP3 X7 X8 X9 XEvo 250; Aprilia Arrecife Atlantic SR Max for Gilera Derbi and Malaguti(250-300cc) OEM # 82941R Part #6113027 841850 843963 AP8580261 : Automotive