Malossi 177cc Cylinder Kit for Vespa P125/150 / Genuine Stella 2T

Malossi 177cc Cylinder Kit for Vespa P125/150 / Genuine Stella 2T. A cylinder kit replaces the cylinder and piston, either to restore compression or to increase displacement for more power. Built to fit Genuine Stella 2T, Genuine Stella.

Big bore kits usually need re-jetting and sometimes a matching head, so check what is included. Confirm the bore size and that the kit fits your engine code.

Product details

Malossi 177cc cylinder kit for vintage Vespa P125/150-series and Genuine Stella 2T scooters. Cast iron cylinder barrel with high-RPM porting delivers strong top-end power while maintaining usable mid- and low-range response. Includes cast iron cylinder, aluminum cylinder head, aluminum piston, piston rings, wrist pin, circlips, head gasket, and carb jetting. Made in Italy by Malossi.

Key Features:

• Cast iron cylinder barrel with optimized high-RPM port layout
• Aluminum cylinder head with hemispherical combustion chamber and wave cooling fins
• Flat-crown aluminum piston with 2-ring design and rectangular transfer port windows
• Strong top-end power with minimal sacrifice in mid- and low-range response
• Recommended upgrades: performance exhaust and 26/26 carb for best results
• Made in Italy by Malossi since 1930

Kit Contents:

• Cast iron cylinder barrel
• Aluminum cylinder head
• Aluminum piston with wrist pin and circlips
• 2 piston rings
• Head gasket
• Carb jets: 115 main jet, BE4 atomizer, 52/140 idle jet

Specifications:

• Brand: Malossi
• Displacement: 177cc
• Cylinder material: Cast iron
• Head material: Aluminum alloy
• Made in Italy

Compatibility:

• Vespa: Sprint
• Vespa: GTR 125
• Vespa: TS 125
• Vespa: P125E
• Vespa: PX125E
• Vespa: P150X
• Vespa: PX150E
• Genuine: Stella 2T

Installation note: On some applications, the cylinder cooling fins at the base may contact the flywheel. If this occurs, the affected fins must be ground off for clearance. This does not affect cooling performance or cylinder longevity. Use a grinding bit and proceed carefully — any damage from modification is the owner’s responsibility.

Off-road use only. Not intended for use on public roads or land. Not legal for use in California on pollution-controlled vehicles — check local laws before installing. Performance parts are not covered under warranty.

Specifications

• Fits: Vespa Sprint, GTR 125, TS 125, P125E, PX125E, P150X, PX150E and Stella 2T
• Part type: Big Bore & Cylinder Kits
• Engine size: 177cc
• Condition: New

Fitment

Fits:

• Vespa Sprint
• Vespa GTR 125
• Vespa TS 125
• Vespa P125E
• Vespa PX125E
• Vespa P150X
• Vespa PX150E
• Stella 2T

Shop more: Genuine Stella Parts · Scooter Big Bore & Cylinder Kits · Genuine Scooter Parts · Scooter Parts