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70cc Big Bore Cylinder Kit + Head for Aprilia RS50 2006 Derbi Senda with D50B0 Inlets & Reeds JINAN QINGQI QM50QT-6(A)Cylinder kit 70cc for Derbi Senda with head, piston and gasket Cast iron cylinder kit, complete with matching 2 piece cylinder head for motorcycles using either the Derbi D50B0 or D50B1 2 stroke engine. Kit is supplied with Cylinder Barrel, cylinder head and piston set (rings,pin,clips), gaskets. Fit for: Aprilia RS50 2006 on (Derbi D50B engine) Derbi 50cc geared with D50B0 engine (05 on) Aprilia RS 50 06 10 (D50B) ZD4PL ZD4RG Aprilia RX 50 06 10