Cylinder Kit Polini PRE4 70Cc Pre / C-One Piaggio / Minarelli

Polini EVOLUTION P.R.E. 4 – Racing Technology for Maximum Performance With the new EVOLUTION P.R.E. 4 product line, Polini once again sets standards in scooter racing. Available in 70cc and 100cc, developed for scooters with Piaggio or Minarelli engines with flange-mount crankcases. Polini PRE 4 Cylinder The Polini Evolution P.R.E. 4 cylinder is the heart of the P.R.E. 4 engine, an extremely powerful cylinder for those who want to be at the front of the pack on the race track. The sophisticated 5-transfer port layout with a bridged exhaust port ensures optimal gas flow and peak performance. The internal geometry, as well as the combustion chamber and squish gap, are precisely calculated for each displacement version to get the absolute maximum out of your engine. A real highlight is the completely redesigned, two-piece cylinder head in Polini blue. Thanks to the lateral water connection, it can be mounted quickly and easily on almost any scooter. The 70cc racing cylinder should be used in combination with the precisely matched P.R.E. 4 exhaust and P.R.E. 4 crankshaft and is intended for use with a high-end tuning crankcase (Malossi C-One, Polini P.R.E., 2Fast Passion, 8.1 Fireblade). Polini Racing Engine - Perfectly Matched Racing Kit The new PRE 4 set consists of a cylinder, crankshaft, and exhaust, which were developed as a perfectly matched unit. The result is explosive power delivery and spontaneous throttle response even at low RPMs. A clear upgrade for riders who expect maximum power, reliability, and consistent performance throughout the entire race. Details Polini P.R.E. 4 Aluminum Cylinder 70cc high-end aluminum cylinder (FL) Bore: 47.6mm 5 transfer ports, bridged exhaust port Compression: 16.1:1 Squish: 0.45mm Modular cylinder head with lateral water connection For Piaggio short (Zip SP) and Minarelli horizontal (Jog RR)