As long as Vespa models possess ball bearings positioned on both sides of the crankshaft (clutch and flywheel) such as smallframe and Vespa Rally models etc. , the crankshaft should firstly be pulled into the flywheel side of the motor during assembly. This tool has an extractor centre piece with an inner thread corresponding to the thread on the flywheel side of the crankshaft, thus enabling a safer, more professional reassembly of your motor.