Crankshaft -POLINI (rotary valve)- Vespa PK50 XL (Ø=20mm cone)

Description

Very high quality Polini tuning crankshaft. Solid CNC connecting rod, top and bottom slotted. Extended intake angle to increase the time cross section of the intake and increase the power over the whole rev band. Condition when using larger cylinders/carburettors. But also brings already a noticeable effect on original cylinders.

Well balanced, the Polini shaft offers a clean concentricity.

Technical data:

• cone: large type (Ø20mm shaft seal)

• stroke: 43mm

• piston pin: 12mm

Suitable for:

• Vespa PK50 XL/XL2

• also suitable for Vespa V50, 50N, 50 Special, PK50 S if at the same time the ignition/pole wheel is converted to the Ø20mm type (conversion to electronic ignition)

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