Z 27 X 69 with straight teeth and shock absorbers

Balanced, raised, and treated basket (anti-groove), ground sliding table, complete with shock absorbers.

Z 27 X 69 with straight teeth
with shock absorber

Z 24 X 72 with straight teeth
with shock absorber

Z 27 X 69 with straight teeth
with shock absorber

The power developed by an engine, whether standard or modified, will be pointless if it is not transmitted to the wheels in the most efficient and effective way, without unnecessary friction and waste of mechanical energy.

Malossi, a leader in the production of high-performance components for the scooter world, has concentrated all its know-how by completely redesigning the primary transmission for the classic Vespa "small frame" to ensure that the maximum power is transformed into road performance.

The new Malossi primary transmission for the Vespa is a true concentration of engineering. From the highest quality materials to the attention to detail and the quality of the mechanical processes, everything is brought to a very high level. From the bronze bushing, to the clutch basket and the gears, everything is processed separately to ensure that each single component is produced according to the highest quality standard.

The heart of the innovations introduced in this transmission is the new clutch bell, made from special solid steel, characterized by six slots for the clutch discs, all six "active" and aimed at locking the discs. In this way, all mechanical play is reduced to a minimum, as well as vibrations and the consequent wear of the basket itself and the guide teeth of the discs.
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The power developed by an engine, whether standard or modified, will be pointless if it is not transmitted to the wheels in the most efficient and effective way, without unnecessary friction and waste of mechanical energy.

Malossi, a leader in the production of high-performance components for the scooter world, has focused all its know-how by completely redesigning the primary transmission for the classic Vespa "small frame" to ensure that the maximum power is transformed into road performance.

The new Malossi primary transmission for the Vespa is a true concentration of engineering. From the highest quality materials to the attention to detail and the quality of mechanical processes, everything is brought to a very high level. From the bronze bushing to the clutch basket and gears, everything is worked separately to ensure that each individual component is produced according to the highest quality standard.

The core of the innovations introduced in this transmission is the new clutch bell, made from special solid steel and characterized by six slots for the clutch discs, all six "active" and designed to lock the discs. In this way, all mechanical play is minimized, as are vibrations and the consequent wear of the basket itself and the guide teeth of the discs.

The new primary transmission is also

Pinasco has developed a new clutch bell specifically for Vespa Small Frame racing, capable of withstanding the stress created by engine performance increases. Completely machined from solid, the new Pinasco Racing Clutch Bell has the advantage of being more resistant than the stamped one due to the use of carbon steel and the increased support surface of the clutch discs.

Equipped with a specific removable and serviceable shock absorber, the new Pinasco Racing Clutch Bell with straight teeth is a high-tech component that is easy to install.

Great upgrade kit for the primary transmission ratio of all PV125, ET3, PK80-125 S/XL/XL2 engines (also usable in 50cc engines if a primary transmission ratio with shock absorbers/spring buffers is installed).

Composed of:

Fabbri Racing CNC clutch basket
Fabbri Racing CNC cover plate
Screw connection
Suitable for 4-disc clutches


The set massively reinforces the primary transmission and makes it durable even for powerful engines. The CNC milled cover plate effectively prevents the breakthrough of the thin standard plates and thus keeps the shock absorber springs in position. The reinforced clutch basket offers total safety thanks to the high-strength material used, even on extremely powerful and high-torque engines. A recess in the basket allows the clutch pinion to be replaced without disassembling the entire primary.

Reinforced compared to the endurance version

Reinforced compared to the endurance version

These springs act as dampers in the primary transmission. They are used to protect the gearbox even with very high torque engines. The stronger springs maintain a residual stroke even under heavy loads compared to standard springs. Load peaks are thus absorbed and not transmitted to the gearbox. Despite the harder springs, the gearbox is effectively protected, and the gearbox and all other transmission components will thank you with a long service life.

Diameter Ø11.20mm
Length: 29.90mm
Wire thickness: Ø 2.00mm
Scope of delivery: 4 springs (set) suitable for one primary
Suitable for: All Vespa Smallframe primary reductions with snap dampers ex works (all over 50cc)

Z 24 X 72 with straight teeth
with shock absorber

Z 27 X 69 with straight teeth and shock absorber

Z 24 X 72 with straight teeth
with shock absorbers

The construction of the teeth is carried out with a module 1.5 gear cutter tool with relative corrections for the pinions added to the original pair.

The width of the tooth has been widened (1 mm towards the inside) to have greater resistance without compromising smoothness.
The spring seats have been revised to use springs with square wire. The greater stroke of the damper preserves the gearbox and the driveshaft.
In the center, there is a roller bearing on the most stressed part and a guide bushing on the shaft. This solution allows the bell to be compatible with the original starter gears.

The construction of the teeth is carried out with a module
1.5 gear shaper tool with relative corrections for the pinions added to the original pair.

The width of the tooth has been widened (1 mm towards the inside) to
provide greater resistance without compromising smoothness.
The spring seats have been revised to use springs with square wire. The greater stroke of the shock absorber preserves the gearbox and cruise.
In the center, there is a roller bearing on the most
stressed part and a guide bushing on the shaft. This solution
allows the bell to be compatible with the original starting gears.

The construction of the teeth is carried out with a module 1.5 gear shaper tool with relative corrections for the pinions added to the original pair.

The width of the tooth has been widened (1 mm inward) to have greater resistance without compromising smoothness. The spring seats have been revised to use springs with square wire. The greater stroke of the shock absorber preserves the gearbox and the cruise. In the center, there is a roller bearing on the most stressed part and a guide bushing on the shaft. This solution allows the bell to be compatible with the original starting gears.

The construction of the teeth is carried out with a module gear shaper
1.5 with relative corrections for the pinions added to the original
pair.

The width of the tooth has been widened (1 mm inward) to
provide greater strength without compromising smoothness.
The spring seats have been revised to use springs with square
wire. The greater travel of the shock absorber preserves the gearbox and clutch.
In the center, there is a roller bearing on the most
stressed part and a guide bushing on the shaft. This solution
allows the bell to be compatible with the original starting
gears.

The construction of the teeth is carried out with a module hob
1.5 with relative corrections for the pinions added to the original
pair.

The width of the tooth has been widened (1 mm towards the inside) to
have greater resistance without compromising smoothness.
The spring seats have been revised to use springs with square wire. The greater travel of the shock absorber protects the gearbox and cruise.
In the center there is a roller bearing on the most
stressed part and a guide bushing on the shaft. This solution
allows the bell to be compatible with the original starting
gears.

The construction of the teeth is carried out with a module gear hob
1.5 with relative corrections for the pinions added to the original
pair.

The width of the tooth has been widened (1 mm towards the inside) to
achieve greater resistance without compromising smoothness.
The spring seats have been revised to use springs with square wire. The greater travel of the shock absorber preserves the gearbox and the cruise.
In the center, there is a roller bearing on the most
stressed part and a guiding bushing on the tail. This solution
allows the bell to be compatible with the original starting gears.

The construction of the teeth is carried out with a module gear shaper tool
1.5 with relative corrections for the sprockets added to the original
pair.

The tooth width has been widened (1 mm towards the inside) to
achieve greater resistance without compromising smoothness.
The spring seats have been revised to use springs with square wire. The greater travel of the damper preserves the gearbox and cruise.
In the center, there is a roller bearing on the most
stressed part and a guide bushing on the shaft. This solution
allows the bell to be compatible with the original starting
gears.

The construction of the teeth is carried out with a module gear shaper tool
1.5 with relative corrections for the pinions added to the original
pair.

The width of the tooth has been widened (1 mm towards the inside) to
achieve greater resistance without compromising smoothness.
The spring seats have been revised to use springs with square wire.
The greater stroke of the shock absorber protects the gearbox and cruise.
In the center, there is a roller bearing on the most stressed part and a guide bushing on the shaft end. This solution
allows the bell to be compatible with the original starter gears.

Z 24 X 72 with straight teeth
with shock absorber

Engages on 24/72 straight teeth by Polini

The power developed by an engine, whether standard or modified, will be pointless if it is not transmitted to the wheels in the most efficient and effective way, without unnecessary friction and waste of mechanical energy.

Malossi, a leader in the production of high-performance components for the scooter world, has concentrated all its know-how by completely redesigning the primary transmission for the classic Vespa “small frame” to ensure that the maximum power is transformed into road performance.

The new Malossi primary transmission for the Vespa is a true engineering marvel. From the highest quality materials to the attention to detail and the quality of mechanical processes, everything is brought to a very high level. From the bronze bushing to the clutch basket and gears, everything is machined separately to ensure that each individual component is produced to the highest quality standard.

The core of the innovations introduced in this transmission is the new clutch bell, made from special steel and characterized by six slots for the clutch discs, all six "active" and aimed at locking the discs. In this way, all mechanical play is minimized, as are vibrations and the consequent wear of the basket itself and the disc guide teeth.

The new primary transmission is also completely disassembl

Clutch bell machined from solid complete with springs and primary 72 teeth, compatible with 23, 24, and 25 teeth pinion. Shock absorbers machined from solid.

Clutch bell machined from solid complete with springs and primary 69 teeth, compatible with pinion 26 and 28 teeth. Shock absorbers machined from solid.

Z 27 X 69 with straight teeth
with shock absorber