47mm 70cc Big Bore Cylinder Kit & Head For Derbi 50 GPR Racing Senda R SM DRD

Derbi DRD Pro 50. Aprilia RS 50 (from year of manufacture. 2006) (derbi engine). Aprilia RS4 50 (from year of manufacture. 2011) (derbi engine). Aprilia RX 50 (from year of manufacture. Aprilia SX 50 (derbi engine). ).

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