Cilindri
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Gruppo Termico Polini 177cc (d=63mm) Vespa 125cc PX / TS
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Gruppo termico d.63mm Top Performances 183cc Yamaha Xmax 125cc
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Gruppo termico Polini 177cc, Vespa PX / Cosa 125 - 200, d=63mm, 57mm corsa
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Gruppo Termico Malossi 180cc (D. 63mm) Yamaha Xmax / X-City 125cc ie
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