Crankshaft -BGM PRO Racing (rotary slider)- Vespa PK50 XL (Ø 20mm cone)

BGM PRO Racing crankshaft for Vespa PK50 XL with 20mm cone

Material:
The BGM crankshafts are forged like in the good old Piaggio days. During forging, the material is pressed together under high temperature and pressure. This results in a higher density of the material. Heat is dissipated much better. The material is more resistant to warping. This is a huge advantage over the crankshafts produced by other manufacturers, whose materials often do not even reach the level of a standard shaft.

Tuning:
The high quality of the material used also allows the use of very light pole wheels without the risk of crankshaft damage. This allows better acceleration behavior to be combined with significantly increased engine durability. This is particularly important on high-displacement and high-speed engines.

Improvements:
An interesting side effect is the conversion to an electronic 12V ignition, which is always necessary when converting a Vespa 50 S/N or PK50S to this type of crankshaft.
With our BGM ignition kit, even the otherwise badly underexposed 6V Vespas can enjoy the benefits of bright 12V halogen light.

Control angle:
The control angle of this crankshaft is longer than that of a standard shaft. Ideal for giving all cylinders, from 50cc Sport to 112cc Racing, a lot more steam. With tuning cylinders, the standard shaft cannot keep up with its significantly too short intake time. When a certain engine speed level is reached, the engine is then literally shut off. With the optimized control angles of our shaft, the engine can be tuned as if an original Piaggio shaft had been installed. Nevertheless, the extended intake angle ensures that even completely rebuilt engines can rev to full power. In addition, the rotary valve inlet of the housing can be extended to create sufficient space for larger carburetors and further increase the engine's performance.

• Stroke: 43 mm
• Control angle: Sport / Racing
• Cone type: PK XL50