Suitable for standard or large-carb equipped models, Polini’s crankcases for the Vespa PX have been updated and are now available to suit large frame PX125/150 and PX200 scooters. The aluminium alloy crankcases are compatible with original components, but replace the rotary valve system with a flat reed valve design to improve power delivery. A racing reed valve pack for 28/30mm carburettors is also available.
Key upgrades include an enlarged ignition side bearing for durability, optimised swing arm geometry, reinforced mounts, and improved oil capacity. SRP is £794 for the PX125/150 version, £804 for the PX200.
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