Vespa Engine and Parts

Attention: On the original Piaggio casing, it is necessary to bore.

Pair of sandblasted die-cast aluminum-silicon alloy crankcases.
Integral Malossi project with reed valve intake, controlled by a large
4-petal valve.

They can be used with any thermal unit, exhaust system, crankshaft, and fuel system.

The Malossi reed valve crankcases are perfectly interchangeable with the
original ones and are equipped with a special intake manifold for the
original carburetor or a SHA 13/13 carburetor.
A specific fuel system has been created with a 19 mm carburetor and E12 type air filter, complete with all parts for installation.

Given the very limited insertion spaces in the Piaggio frames, it was
necessary to create a super compact engine, and the great commitment of
our technicians is once again crowned with full success.
The objectives achieved are: highly technical product, robustness,
simplicity, ease of installation, excellent operational result
without modifications (everything connects as in the original engine).
The large 4-petal composite fiber reed valve ensures a

TECHNICAL FEATURES

Half-shaft material: 18 Ni Cr Mo5.
Monolithic forged half-shafts and rotating masses.
Machining on high-precision machine tools.
As many as five heat treatments on all components.
High surface finish to improve reliability.
Dynamic balancing up to 16,000 rpm.
Forged connecting rod in 18 Ni Cr Mo5 copper-plated, coupled to the shaft with a precision roller bearing for high speeds.

An exact replica of the original PIAGGIO base produced for the Ciao, Bravo, Si, etc. mopeds, suitable for standard and modified engines.

The supply includes all the nuts, bolts, and washers necessary for assembly, the cylinder mounting studs, and also both crankshaft bearings. 

(6 transfers - 2-ring piston)

In these thermal units, the characteristic of high durability of cast iron combines with the almost obsessive quality standards of Malossi, one of the very few companies demanding the maximum even from this class of thermal units.
In this perspective, the very strict selections for the coupling between the cylinder and piston are strictly maintained within the range of 20 microns maximum tolerance.

Ø 26x19x9 mm

Pair of crankcases in silicon aluminum alloy die-cast and shot-blasted.
Integral Malossi project with reed valve intake, controlled by a large
4-petal valve.

They can be used with any thermal group, exhaust system, crankshaft, and fuel system.

Malossi reed valve crankcases are perfectly interchangeable with the
original ones and are equipped with a special intake manifold for the
original carburetor or an SHA 13/13 carburetor.
A specific fuel system has been made with a 19 mm carburetor and E12 type air filter, complete with all the parts for installation.

Given the very limited insertion spaces in Piaggio frames, it was
necessary to create a super compact engine, and the great effort of
our technicians is once again crowned with full success.
The goals achieved are: highly technical product, robustness,
simplicity, ease of assembly, excellent operating result
without modifications (everything connects as in the original engine).
The large 4-petal composite fiber reed valve ensures a
smooth and progressive intake that optimizes the torque curve starting
from the lowest

Complete with bearings, seals, and shims.

TECHNICAL FEATURES

Half-shaft material: 18 Ni Cr Mo5.
Monolithic forged half-shafts and rotating masses.
Machining on high-precision machine tools.
Five heat treatments on all components.
High surface finish to improve reliability.
Dynamic balancing up to 16,000 rpm.
Forged rod in copper-plated 18 Ni Cr Mo5, coupled to the shaft with a precision roller bearing for high speeds.

The only cylinders on the market for CIAO/SI with split exhaust and symmetrical transfers!
The exhaust fitting is screwed on and offers two great advantages: Extreme resistance and the possibility of replacement in case of breakage Possibility to enlarge the exhaust outlet, further increasing performance These results have been made possible by the decompression valve provided in the kit, which is smaller than the original Piaggio one.
The most important innovation is represented by the completely redesigned internal transfer system, specifically studied to achieve cylinder washing while maximizing power at the correct usage regime.

Attention: On original Piaggio crankcases, it is necessary to bore.

The only cylinders on the market for CIAO/SI with split exhaust
and symmetrical ports!!!!

The exhaust fitting is screwed on and offers two major
advantages:
Extreme durability and the possibility of replacement in case of breakage
Possibility to enlarge the exhaust outlet, further
increasing performance

These results have been made possible by the decompression valve
provided in the kit, which is smaller than the original
Piaggio one.

The most important innovation is represented by the completely redesigned
internal porting
specifically studied to achieve cylinder flushing
maximizing power at the correct operating speed.

Note: On the original Piaggio engine case, boring is necessary.

Attention: enlarged Ø27 attack (only for BIG DEPS Malossi cylinders or equivalents.)

Size: 15x24x5

Attention: On original Piaggio crankcase, it is necessary to bore.

The FLY CLUTCH Kit is interchangeable with the original transmission and improves its
performance and durability thanks to high-quality materials and reinforcement where necessary.

For vehicles with variator.

1. Fixed Pulley

This fixed pulley is at 15° with a diameter of 102 mm, gas nitrided for excellent durability, has a positive double “d” mounting on the hub, and is secured with a Zinc-plated M24 nut.

2. Torque Driver

It consists of a 15° pulley with a 102 mm diameter, TIG welded to a specially designed hub with a pressed EKU bushing. EKU is a dry self-lubricating material that ensures excellent sliding behavior and minimal wear.
Also adaptable to the original Piaggio system.

3. Variator contrast spring

These springs, made of high-carbon silicon alloy steel and heat-treated, are dynamically balanced, oven-painted, and designed and calculated for each specific application.

4. Fly Clutch

Fly Clutch consists of three new clutch masses using the Fly Malossi system. Designed

These gears are created by leveraging Malossi's twenty years of experience in the design and production of gears. The new H.t.q. gears have been designed and manufactured with straight/helical teeth to minimize friction losses and stress on supports. Additionally, our gears optimize the gear ratio, allowing you to fully exploit the power delivered by your vehicle, ensuring a significant extension compared to the original condition.

Pre-tempered high load carbon steel springs with high yield strength,
protected by a coating in various colors with high thermal resistance.
The different coloring highlights the load of each series of springs.

This special key has been designed and manufactured by Malossi
specifically to eliminate the problem of potential fatigue failure
in the Malossi crankshafts art. 531802 and 537313 for
Piaggio mopeds.

For Hello PX with variator

Having fun without complications

(6 transfers - 2-ring piston)

Malossi cast iron thermal groups, the first and simplest step to modify your moped's engine, are the optimal choice to continue using a standard or homologated exhaust system.

Having fun without complications

(6 transfers - 2-segment piston)

The Malossi cast iron thermal groups, the first and simplest engine modification step for your moped, are the optimal choice for continuing to use a standard or type-approved exhaust system.

In the Power package, you will find everything you need:

Adapter ring to properly fix the stator to the crankcase
4-pole 12 Volt stator (90 watts). It is necessary to change all the original bulbs!
Lightened flywheel (mass 885 gr for a moment of inertia of 16.2Kg/cm2) made from a hot-stamped solid piece and designed to withstand even the highest rotation speeds!
Red plastic fan!
Dedicated ready-to-use wiring with output cable for battery charging or stereo connection, for original modifications!
Voltage regulator!

Note--> Without variator