Malossi 177cc cylinder kit (MCK2) complete flat-lay — aluminum cylinder head with wave fins (left), aluminum piston with 2 rings and wrist pin (center), cast iron barrel with exhaust spigot (right), plus piston rings, circlips, 3 brass carb jets, and head gasket; for Vespa P125/150 and Genuine Stella 2T Malossi 177cc cylinder kit (MCK2) complete flat-lay — aluminum cylinder head with wave fins (left), aluminum piston with 2 rings and wrist pin (center), cast iron barrel with exhaust spigot (right), plus piston rings, circlips, 3 brass carb jets, and head gasket; for Vespa P125/150 and Genuine Stella 2T
Malossi 177cc kit piston (MCK2) — aluminum flat-crown piston with 2 ring lands, rectangular transfer port windows, and wrist pin bore; for Vespa P125/150 and Genuine Stella 2T Malossi 177cc kit piston (MCK2) — aluminum flat-crown piston with 2 ring lands, rectangular transfer port windows, and wrist pin bore; for Vespa P125/150 and Genuine Stella 2T
Malossi cylinder head (MCK2) — top-down view of aluminum alloy head showing hemispherical combustion chamber, central spark plug boss, 4 head bolt holes, and radial wave cooling fins; "MALOSSI" and "MADE IN ITALY" cast text visible Malossi cylinder head (MCK2) — top-down view of aluminum alloy head showing hemispherical combustion chamber, central spark plug boss, 4 head bolt holes, and radial wave cooling fins; "MALOSSI" and "MADE IN ITALY" cast text visible
Malossi 177cc cast iron cylinder barrel (MCK2) — 3/4 view showing horizontal cooling fins, open-bottom bore with intake ports, side-exit exhaust port, and 4-bolt mounting flange; for Vespa P125/150 and Genuine Stella 2T Malossi 177cc cast iron cylinder barrel (MCK2) — 3/4 view showing horizontal cooling fins, open-bottom bore with intake ports, side-exit exhaust port, and 4-bolt mounting flange; for Vespa P125/150 and Genuine Stella 2T
Malossi 177cc cylinder kit (MCK2) complete flat-lay — aluminum cylinder head with wave fins (left), aluminum piston with 2 rings and wrist pin (center), cast iron barrel with exhaust spigot (right), plus piston rings, circlips, 3 brass carb jets, and head gasket; for Vespa P125/150 and Genuine Stella 2T
Malossi 177cc kit piston (MCK2) — aluminum flat-crown piston with 2 ring lands, rectangular transfer port windows, and wrist pin bore; for Vespa P125/150 and Genuine Stella 2T
Malossi cylinder head (MCK2) — top-down view of aluminum alloy head showing hemispherical combustion chamber, central spark plug boss, 4 head bolt holes, and radial wave cooling fins; "MALOSSI" and "MADE IN ITALY" cast text visible
Malossi 177cc cast iron cylinder barrel (MCK2) — 3/4 view showing horizontal cooling fins, open-bottom bore with intake ports, side-exit exhaust port, and 4-bolt mounting flange; for Vespa P125/150 and Genuine Stella 2T

Malossi

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

SKU MCK2
$367.00 Sold out
Shipping calculated at checkout.
Description

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: Prima 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
  • SKU: MCK2
  • Displacement: 177cc
  • Cylinder material: Cast iron
  • Head material: Aluminum alloy
  • Made in Italy

Compatibility:

Make Model
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.
Product Diagrams
Features
  • Cast iron cylinder barrel with optimized high-RPM port layout — strong top-end with usable mid/low range
  • Aluminum cylinder head with hemispherical combustion chamber and wave cooling fins
  • Flat-crown aluminum piston with 2-ring design and rectangular transfer port windows
  • Complete kit: cylinder, head, piston, rings, wrist pin, circlips, head gasket, and carb jets (115 main / BE4 atomizer / 52-140 idle)
  • Made in Italy by Malossi | SKU: MCK2 | Pairs well with Prima exhaust and 26/26 carb
Specifications

Brand: Malossi | SKU: MCK2 | Displacement: 177cc | Cylinder: Cast iron | Head: Aluminum alloy | Piston: Aluminum flat crown, 2-ring | Jets: 115 main / BE4 atomizer / 52-140 idle | Origin: Italy
Model Fitments

Vespa Sprint | Vespa GTR 125 | Vespa TS 125 | Vespa P125E | Vespa PX125E | Vespa P150X | Vespa PX150E | Genuine Stella 2T | Vespa P/PX-series large frame 2T engines
  • Same day shipping for orders placed before 2PM (CST) M-F
  • 30-day return period on eligible items
  • Flat-rate shipping for orders shipped to the 48 Contiguous United States.
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