Description Malossi MHR High Compression Crankshaft for Yamaha (12mm) stroke 39.2 mm. The crankshaft is the heart of the endothermic engine. All aspects of engine performances start from the crankshaft. It is not possible to obtain good engine performance and reliability unless a top-quality crankshaft is fitted. This is why Malossi produces only the very best in crankshafts. Inertial mass increased by 10%. Reinforced connecting rod to withstand higher loads. Crankshaft drive side cross section area increased by 10% with consequent greater resistance. The diameter of the drive side oil seal has been increased from 19 to 20mm so as to increase the resistance of the shaft. *Performance scooter parts do not come with a warranty*
