Crankshaft Polini P.R.E 4 c.47mm Piaggio / Minarelli scooter 50 2T

Crankshaft Polini P.R.E 4 stroke 47mm for Piaggio / Minarelli scooter 50 2-Stroke.

If you are preparing a high-level engine like the Polini P.R.E., you need a crankshaft that is up to the task. This 47mm stroke model is ideal if you want your engine to withstand maximum stress on the track without risk of breakage. It is an engineering piece designed to endure extremely high RPMs and transmit all the power to the transmission in a balanced way.

When you move from a basic setup to a racing one, the stock crankshaft becomes the weak point. The Polini P.R.E. is made with high-strength materials and a reinforced 100mm connecting rod that ensures it does not bend or break under pressure. Being perfectly balanced, you will notice that the engine vibrates much less and revs up with astonishing ease, allowing you to get every bit of power from your cylinder.

Technical specifications

• Stroke: 47 mm.
• Connecting rod: 100 mm length, designed to reduce lateral forces on the piston.
• Piston pin: Compatible with 14 mm piston pins.
• Balancing: Done with tungsten inserts for maximum stability at high RPM.
• It is recommended to install with the Cylinder Polini P.R.E 4 140.0240

NOTE: Can be installed with the original Piaggio crankcase or with Malossi RC or C-ONE and Polini crankcases.

Attention! To install this crankshaft, it is essential to use high-speed bearings (type C4) and a quality racing needle bearing to ensure proper lubrication.