Malossi Racing Cylinder Kit for Air Cooled Vespa, Piaggio, and Aprilia 125-150cc Scooters with Piaggio Leader Engine. No other Big Bore Kit makes as much power as this Malossi Big Bore Kit, 187.6cc, Aluminum cylinder, Nikasil lined cylinder. Complete and ready to install Includes Piston, Rings, Gaskets.  For models WITH CARBURETOR only. Proven to be as reliable as the original cylinder. 

For newer ie or fuel injected models, use part number 3114621, it has the electronic components  you need to make it work. 

TECHNICAL SPECIFICATIONS

Cylinder

    Bore 70 mm;

    Stroke 48.6 mm;

    Displacement 187.6;

    Compression ratio 11.5:1.

    Material: primary aluminium alloy with a high content of hardened and tempered silicon, cylinder liner with silicon carbide coating in a galvanic nickel die and crossed smoothing with two diamond passages with very limited tolerances.

    Machining: on machine tools with high precision numerical control.

    Cylinder-piston connection with an allowance of 0.05 mm.

    Recalculated and upgraded heat exchange surfaces.

Piston

    Ultra compact with 3 rings.

    Material: special aluminium alloy with high silicon content, low thermal expansion and a tin facing on the sliding surfaces.

    Machining on machine tools with numerical control.

    Lightened and reinforced.

    Upgraded heat exchange surfaces.

Piston rings

    Special rings with high sliding ease and very high mechanical strength..

    I° ring compression in nitrided and chromium steel.

    II° special cast iron ring.

    Three - piece scraper ring made of chromiumplated special steel alloy.

Fits-

APRILIA Mojito 125 with Piaggio Engine

DERBI Boulevard 125 with Piaggio Engine

 ITALJET Torpedo 125/150

PIAGGIO Fly 125/150 

PIAGGIO LT 150 

PIAGGIO LT 125 

VESPA ET4

VESPA LX 150 with CARBURETOR

VESPA LXV 150 with CARBURETOR

VESPA S 150 with CARBURETOR

This product is intended solely for competition-sports usage. No warranty, express or implied, is offered.

Please read our shipping and returns policy prior to ordering.  M3111393