The most powerful thermal unit ever produced by Malossi: over 32 HP at 14,000 RPM. With its
large displacement and flanged design, this kit is exclusively for liquid-cooled scooters.

Specifically designed for top-level racing, it features
the latest evolution of Malossi’s iconic 7-port technology. The standout feature is the support
provided to the main rear transfer ports through the use of two ports opposite the exhaust, combined
with the advantage of eliminating the space taken up by the through-studs, which are now shorter and
positioned externally. This allows full utilization of the additional space provided by the flanged design.

The cylinder has a close deck structure paired with a redesigned modular head.

The head is designed to enter the cylinder’s combustion chamber, safeguarding the nickel
coating in case of detonation.

To install this thermal unit, modifications to the RC-ONE engine case are required:

In the boring area, to accommodate a crankshaft with an increased stroke and a longer connecting
rod (specifically, a 47mm stroke and a 100mm rod);

the transfer ports need to be further matched.

The volumes and flows have been revolutionized, to unleash all the power this cylinder has to offer. No compromises: a carburetor between 30 and 34 mm is necessary. To ensure perfect synergy
and maximize on-road performance, the 100cc kit
should be paired with our crankshaft, which has
been renewed with a 100 mm connecting rod.

With this cylinder, the engine benefits from creduced
loads on the pistons and bearings, thereby
extending its lifespan. Additionally, friction is
significantly minimized, resulting in increased engine
efficiency, along with a notable
reduction in noise and vibrations.

Theexhaust system accompanying the 100cc
kit is the result of targeted engineering, designed
to enhance performance and perfect the fluid
dynamics of the new Malossi cylinder.

How did we achieve this? By optimizing the
exhaust port angle and implementing a custommade coupling.

Moreover, to ensure an effective connection to the
exhaust pipe, we have developed an ingenious
flange-coupling system, which attaches to the
cylinder with three cylindrical head screws and an
O-ring seal at the exhaust duct. This solution, simple
yet highly effective, prevents any possible leakage
from the thermal unit.

Technical features

Cooling: H2O

Porting: 7 transfer ports

Material: Aluminum

Bore: 52 mm

Stroke: 47 mm

Displacement: 100 cc