Complete crankshaft SIP PERFORMANCE made in Italy for VESPA 150 VB1 VGL1 VL1\2\3 Full Shoulders

Crankshaft complete SIP PERFORMANCE 45184200 Made in Italy for VESPA 150 VB1T VGL1T VL1T VL2T VL3T Direct injection, full shoulder stroke: 57.0mm connecting rod: 110.0mm Race - connecting rod piston pin 15mm with fine balancing with piston pin bearing This crankshaft requires on the flywheel side the woodruff key of the Vespa GS 150, art. no .: 60016828 High-end crankshaft for Vespa fenderlight models. Top quality for a perfect overhaul and an engine with maximum reliability and low vibrations. Together with the cylinder and the piston, the crankshaft is the beating heart of any internal combustion engine. It is among the hardest working components and the conversion of the piston stroke into a rotary motion places the highest demands on both quality and attention to detail during construction. The crankshaft should also be well balanced to reduce any unwanted vibrations and oscillating mass kept to a minimum to support efficient delivery of the power created by the engine. The big end bearing rotates at the same speed as the engines RPM, receives lubrication from the petrol/two-stroke diesel mixture and must withstand two sharp changes in the direction of the piston for each revolution of the engine. The crankpin, connecting both legs of the crankshaft with the connecting rod, must be pressed into the cores with some distance from the openings in the cores. If this connection is not strong enough, the crankshaft may spin and the crankshaft webs become misaligned and seize. To ensure that the big end bearing receives sufficient lubrication, the big end of the connecting rod should be slotted to facilitate this. SIP Crankshafts: This brand new range of performance crankshafts is manufactured for SIP in Italy and meets all the requirements listed above. We have concentrated our efforts to provide the highest quality combined with proven technological features. Each crankshaft is specifically balanced to suit the stroke, connecting rod length and scooter model it is intended for. The crankshafts available in this range can be divided into two main types. The "Premium" ones are equipped with a high-end "standard" type of connecting rod, which means that its surface finish remains unchanged. It is equipped with lubrication grooves and holes, for the large and small bearings respectively. The "Performance" crankshaft models include a very high quality connecting rod and are made more durable with an intensive polishing procedure that provides a more stable molecular structure. The smooth and polished sides of the connecting rod also help to reduce turbulence. The polished connecting rods have also been optimized with a reduction in weight. They have a gas flow profile and have been modified around the large end to improve bearing lubrication. Crankshafts for Vespa 150 VB1T / VGL1T / VL1-3T models: For the engines of the early fenderlight models we also offer very high-quality crankshafts as original spare parts. We offer both the 54 mm stroke and the 57 mm stroke version in premium quality. In addition, the 57 mm stroke version is also available with the high-quality Performance connecting rod. All variants are equipped with large cooling grooves for the high-quality upper and lower needle bearings. Conclusion: the best replacement for the original crankshaft.