Racing cylinder VMC SUPER G 177CC

Powerful cast iron cylinder with 177ccm for Vespa Largeframe

VMC offers different cylinders for the Vespa Largeframe models. The main distinguishing feature is the cylinder base material used.
The SUPER G 177 shown here is made in grey cast iron which makes it inexpensive, but still has a powerful cylinder layout.

  • Bore: Ø63mm

  • Stroke: 57mm (series)

  • Connecting rod length: 105mm (standard)

  • Piston: cast aluminum

  • Piston rings: 2pcs, 1mm thickness

  • Cylinder head: Aluminum die cast (spark plug position like original)

  • 8-bolt cylinder head

The generous channel surfaces do not require long timing angles for its high power capability.
With 114°/173° and the resulting 29.5° advance intake angle, the cylinder is not sensitive to high revs but still very sensitive to a good box exhaust system like the BGM Touring 2 due to the large advance intake.

  • Head angle: 114°/173°

  • Recommended pinch point: 1.0mm (±0.1mm)

  • Tightening torque cylinder head bolts M6: 10-11Nm

  • Tightening torque cylinder head nuts M7: 14-15Nm

  • Enclosed gaskets: 0.2mm, 0.3mm, 0.4mm

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Paulo B. from Heilbronn 05/04/2025
OEM numbers (for comparison purposes only)
Scooter Center:
VMC1901
VMC:
001901
Avotecnica:
001901
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