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Replacement piston for 50cc POLINI cast iron kits on DERBI EURO 3 and 4.
Very good quality piston, Ø39.88mm with 2 thin chromed steel segments. Delivered with its 12mm axis and its two piston clips in G. Ideal for refurbishing your POLINI cast iron kit on DERBI euro 3 and euro 4 engines (from 2006).