Powerful aluminum cylinder with 177cc for Vespa Largeframe
VMC offers different cylinders for the Vespa Largeframe models. The main distinguishing feature is the cylinder base material used.
The CRONO 177 shown here is made of aluminum and has a hard ceramic coating. This means it is perfectly prepared for the high targeted performance of the kit.
Bore: Ø63mm
Stroke: 57mm (standard)
Connecting rod length: 105mm (standard)
Piston: Cast aluminum
Piston pin: Ø15mm
Piston rings: 2pcs, 1mm thickness
Cylinder head: Aluminum CNC
8-fold bolted CNC cylinder head
The generous port areas do not require long control angles for its high power output.
With 117°/177° and the resulting 30° advance angle, the cylinder is already relatively sporty for PX engines and reacts very positively to a good box exhaust system such as the BGM Touring 2 (BGM1010TR2) due to the large advance.
Steering angle: 117°/177°
Recommended pinch point: 1.3mm (±0.1mm)
Tightening torque cylinder head screws M6: 10-11Nm
Tightening torque cylinder head nuts M7: 14-15Nm
Enclosed gaskets: 0.2mm, 0.3mm, 0.4mm
DE | €
