Very high grade processed Polini Tuning crankshaft for Vespa PE 200 and PX 200 maxi-scooters with 16mm gudgeon pins. Thanks to the extended inlet flow angle, the engine can rev more freely meaning the maximum speed is increased. Specifications: inlet flow angle: 110 degrees before TDC to 75 ° after TDC stroke: 57mm gudgeon pin: 16mm