Vespa 150 VB1T VGL1T VL1-3T Crankshaft Mazzucchelli 57mm Stroke 110mm Conrod

Vespa 150 VB1T VGL1T VL1-3T Crankshaft Mazzucchelli 57mm Stroke 110mm Conrod

High end crankshaft for Vespa fenderlight models. Highest quality for a perfect revision and a motor with maximum reliability and low vibration.

Together with the cylinder and piston, the crankshaft represents the beating heart of any internal combustion engine. It is amongst the hardest working components and the conversion of the pistons stroke to a rotary movement places the highest demands on both quality and the care taken during construction. The crankshaft should also be well balanced to reduce any unwanted vibrations and the oscillating mass kept to a minimum to support an efficient delivery of the power created by the motor. The big-end bearing rotates at the same rate as the motors RPM, receives lubrication from the petrol/two-stroke oil gas mixture and must withstand two abrupt changes in direction of the piston for each motor revolution. The crank-pin, connecting both crankshaft webs with the con rod, has to be pressed into the webs with a certain clearance to the openings in the webs. If this connection is not strong enough the crankshaft can twist and the crankshaft webs become misaligned and seize. To ensure the big end bearing receives sufficient lubrication the big end of the con rod should be provided with slots to facilitate this.