ANTICIPATED MALOSSI CRANKSHAFT WITH PIN Ø 15, CONNECTING ROD 97, STROKE 51 MM AND CONE Ø 20 FOR VESPA 50 -ET3 - PRIMAVERA 125 2T

Description

SUITABLE FOR MODELS:

VESPAVESPA ETS 125
VESPAVESPA ET3 Primavera 125 2T
VESPAVESPA PK XL 125
VESPAVESPA PK 125

CRANKSHAFTS MALOSSI FOR VESPA

The Vespa crankshaft is one of the most delicate and important components of this type of engine, having to both manage the movements of the connecting rod and piston, and regulate admission through the timing of the half-shoulder.

The technical office Malossi has focused its attention precisely on these two aspects, creating two versions of the crankshaft and developing new solutions of great technical value, starting with the choice of materials, as always of the highest quality.

All motor shafts Malossi for Vespa they are made of aeronautical quality cemented steel and remelted under vacuum, a material highly resistant to scratches, guaranteed by the certifications required by the very strict specifications Malossi. The "viper head" connecting rod has a conformation designed to minimize weight and guarantee all the necessary rigidity.

Not even the smallest detail has been overlooked. The technicians Malossiin fact, by intervening even on the threading of the transmission-side axle of the drive shafts, they have managed to significantly increase the resistance by using a finer pitch. The position of the key has also been revised both in size and shape, so as to no longer affect the thread and contribute to the resistance in a solution that is finally at the forefront. The crankshafts are supplied with special nuts, much more resistant, to take advantage of the greater resistance offered by the tighter thread.



ROTARY VALVE CRANKCASE SHAFT

In the version dedicated to rotary valve thrusters, the intake phase has been obtained inside the half-shoulder, in the structure with circular masses itself, which has produced a considerable slot facing inwards, while maintaining a regular external profile. This innovative choice has made it possible to obtain a unique shape capable of guaranteeing extremely effective fluid dynamics.

Such conspicuous slots have always been one of the most delicate points of the Vespa crankshafts when looking for the correct balance. Malossi has solved this problem by including inserts made of wolfram in the crankshaft and used as counterweights to increase the stability of the shaft itself.



FULL SHOULDER TREE

The tree Malossi full shoulders, intended only for Vespa engines modified to use a reed valve admission system, instead of the original rotary valve, they are the new frontier for Vespa enthusiasts.

As for the rotary valve version, also in this case, the optimal balance is guaranteed by the wolfram inserts.
The circular mass structure is the area that benefits most from this new shaft and crankcase configuration, receiving the maximum possible amount of pressure.



DIFFERENT VERSIONS

Crankshafts with different connecting rod lengths are available for the "small frame" Vespas on which the shaft with full shoulders will be installed.

The shaft dedicated to engines with rotary valve admission has a standard stroke and connecting rod length.

Products to be used exclusively for racing in places specially designed for such activity according to the regulations of the competent sporting authorities. We decline any responsibility for improper use