Modern Vespa

For Air Cooled Vespa, Piaggio, and Aprilia 125-150cc Scooters with Piaggio Leader Engine. Malossi Big Bore Kit, 187.6cc, Aluminum cylinder, Nikasil lined cylinder. With Piston, Rings, Gaskets. Without Head. For models WITH CARBURETOR only.

For newer ie or fuel injected models, use part number M3111461, it has the electronic components you need to make it work. Call with fitment questions.

https://scooterpartsco.com/01-malossi-master-part-list-c-170_180/malossi-190cc-cylinder-kit-for-vespa-et4-lx150-carburetor-p-209.html

TECHNICAL SPECIFICATIONS

Cylinder

Bore Ø 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
VESPA LXV 150
VESPA S 150

We now have very good rates on shipping to Canada and Australia for this kit.

Interested in this kit and there's a thread down in Projects now doing a big bore swap on a 150 asking carburetor questions.

In order to continue I'd have similar questions. If I installed this kit would I use the original carb or would I need a bigger one? If so, what would fit so that everything else still lines up and fits right?

Original carb. You might upjet it one or two sizes, but that's often not necessary.

Thank you