10Pollici - 11082 - Crankshaft -BGM PRO Racing (rotary valve)- Vespa V50, PK50 S (Ø 19mm cone) - BGM
SC Tutorial Crankshaft Inlet Timing | Vespa rotary valve engines are more popular than ever for tuning purposes. A simple design that scores with standard optics, original carb system and an...
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