BGM PRO 150ccm tuning cylinder for Vespa Wideframe models
The BGM PRO 150cc cylinder with 57 mm stroke fits all 2-port engines.
The cast iron cylinder features three transfer ports and is suitable for all Wideframe engines with 57 mm stroke. It also fits 125cc engines with 54 mm stroke perfectly when combined with a 57 mm crankshaft.
The third transfer port on the cylinder is sealed using the supplied aluminium base gasket spacer and is scavenged via a corresponding cutout in the piston. No modifications to the engine casing are required.
- Displacement: 150 cc
- Stroke: 57 mm
- Piston: Ø = 57 mm
- Piston rings: 2 x 1.5 mm
- Cylinder material: cast iron
- Cylinder head: CNC machined from solid aluminium with additional cooling fins at the bottom
- Transfer ports: 3
- Spark plug: short thread (e.g. NGK B8HS, Bosch W3AC)
Noticeably more power & higher top speed
This cylinder gives classic Vespa models a significant boost in torque and top speed. Strong acceleration, even by modern standards, is the BGM PRO 150’s speciality. Depending on the setup, it delivers 8–10 hp at the rear wheel and allows cruising speeds of 90 km/h or more without sacrificing reliability.
An ideal addition is the 23 mm CP carburettor combined with the BGM PRO intake manifold (see accessories).
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