Malossi 177ccm Cast Iron Cylinder (63 mm) – noticeably more power for your Vespa Largeframe 125/150

With the Malossi racing cylinder made of cast iron, you can extract significantly more performance from your classic Vespa Largeframe – without complicated modifications. Thanks to the 63 mm bore in combination with the standard 57 mm stroke, a powerful setup is created with more torque and a higher top speed. Exactly right if you want to make your Vespa PX 125 or Vespa PX 150 (and many other 125/150 Largeframe models) suitable for everyday use, but noticeably sportier.

The generously sized transfer ports and the precisely machined exhaust port significantly improve the gas exchange. Result: more pull in the lower and middle RPM range as well as better acceleration – your Vespa Cosa 125, Vespa PX 125, or Vespa Sprint 150 simply drives more lively with this.

Practical: Installation is plug-and-play with the original 57 mm crankshaft – an engine opening is not necessary for this.

Advantages & Features

• 177 ccm tuning for Vespa Largeframe 125/150 ccm
• Material: Cast iron – proven, robust and suitable for everyday use
• Bore: 63 mm
• Stroke: 57 mm (standard) – installation with original crankshaft possible
• 6 precisely designed transfer ports for optimal gas guidance
• Improved gas exchange through large transfer ports + machined exhaust port
• More torque and better acceleration in the lower/middle RPM range
• Higher top speed with appropriate tuning

Technical Details & Tuning

• Type: Malossi racing cylinder (cast iron)
• Bore: 63 mm
• Stroke: 57 mm
• Recommended carburetor: 24–28 mm
• Recommendation: Sports exhaust system for optimal performance

For the best performance, Malossi recommends a 24–28 mm carburetor and a sports exhaust system. In this combination, the cylinder shows its full potential and turns your Vespa PX 125 or Vespa Cosa 150 into a powerful everyday vehicle with a sporty touch.

Note on Variants

• M3117676: delivered incl. high-compression cylinder head
• M3118378 (this item): delivered without head
• Both variants deliver a comparable performance level

Compatibility (Vehicles)

Fits many vehicles – such as Vespa PX 125, Vespa PX 150, Vespa Cosa 125/150, Vespa Sprint / Sprint Veloce, as well as numerous LML Star/Stella models. Here is the complete list:

• LML: Star 125 2-stroke
• LML: Star 150 2-stroke
• LML: Bella 150 2-stroke
• LML: Bella 125 2-stroke
• LML: DLX Deluxe 125 2-stroke
• LML: DLX Deluxe 150 2-stroke
• LML: Belladonna 125 2-stroke
• LML: Via Toscana 125 2-stroke
• LML: Via Toscana 150 2-stroke
• LML: Stella 150 2-stroke
• LML: Stella 125 2-stroke
• LML: Belladonna 150 RV 2-stroke
• Vespa: Cosa 125
• Vespa: Cosa 150
• Vespa: TS 125 2-stroke (1975–1978)
• Vespa: Super 150 2-stroke (1966–1979)
• Vespa: PX MY 125 2-stroke (1998)
• Vespa: GTR 125 2-stroke (1968–1978)
• Vespa: PX 150 2-stroke
• Vespa: PX 125 2-stroke
• Vespa: Cosa 2 150 2-stroke (1991–1996)
• Vespa: Cosa 2 125 2-stroke (1991–1996)
• Vespa: Cosa 1 150 2-stroke (1987–1991)
• Vespa: Cosa 1 125 2-stroke (1987–1991)
• Vespa: Sprint Veloce 150 2-stroke (1969–1979)
• Vespa: Sprint 150 2-stroke (1965–1974)
• Vespa: T5 125 Classic Elest. (1985–1995)
• Vespa: PX 125 E Lusso (1981–1997)
• Vespa: Classic P 150 S Strada
• Vespa: P 150 X E (1978–1985)
• Vespa: P 125 X E (1977–1982)

OEM Number (Comparison Purposes)

• OEM No.: 3118378