Attention! Crankshaft Malossi MHR Team 42.3mm stroke/90mm conrod required! The most powerful cylinder ever to be produced by Malossi. High capacity, flanged design, only for liquid-cooled scooters (7 ports and exhaust crossbar - piston with 1 segment - modular head - Made for minarelli crankcase. The most advanced production of Malossi cylinders made for Minarelli engine. Specifically designed to be used in high level competitions, they feature the latest evolution of the iconic Malossi 7 port technology, the strong point of which is definitely the support given to the main rear ports thanks to the use of the two lights opposite the exhaust. The shape of the exhaust also features a structure fitted with an exceptionally thin crossbar with an elliptical-shaped dual port, to minimize stress for the piston ring, combined with an exhaust connection, part of the structure and following its shape. The inner profile of the head, once again modular, has evolved completely and thanks to its design it now guarantees more torque at all engine speeds. The head cover is made of forged aluminium, red anodized and lathed in high precision CNC machines. The installation of a Testa Rossa 90cc Cylinder necessarily requires 42.3m stroke crankshaft with 90mm conrod. To make full use of the potential of these cylinders, it is necessary to draw fully from the Malossi catalogue, selecting all the racing components produced by the Bolognese company.