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

Complete crankshaft SIP PERFORMANCE 45184200 Made Italy for VESPA 150 VB1T VGL1T VL1T VL2T VL3T Direct entry, shoulder full stroke: 57.0mm connecting rod: 110.0mm Race - connecting rod piston pin 15mm with fine balancing with piston pin bearing This crankshaft requires on flywheel side the woodruff key of the Vespa GS 150, art. no.: 60016828 High-end crankshaft for Vespa fenderlight models. Maximum quality for a perfect overhaul and an engine with maximum reliability and low vibrations. Together with the cylinder and the piston, the crankshaft represents 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 the quality and the attention paid 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 large head bearing rotates at the same speed as RPM engines, receives lubrication from the gasoline/two-stroke diesel fuel mixture, and must withstand two abrupt changes in piston direction for each revolution of the engine. The crankpin, connecting both shanks of the crankshaft with the connecting rod, must be pressed into the cores with a certain distance from the openings in the cores. If this connection is not strong enough, the crankshaft can 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 provided with slots to facilitate this. The SIP crankshafts: This brand new range of performance crankshafts is produced for SIP in Italy and meets all the requirements listed above. We have concentrated our efforts on providing the highest quality combined with proven technological features. Each crankshaft is specifically balanced to adapt to the stroke, the length of the connecting rod and the scooter model for which it is intended. 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 grooves and lubrication holes for the large and small bearings respectively. "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, polished sides of the connecting rod also help reduce turbulence. The polished connecting rods have also been optimized with a weight reduction. They have a gas flow profile and have been modified around the large end to improve bearing lubrication. The crankshafts for the Vespa 150 VB1T / VGL1T / VL1-3T models: For the engines of the first Fenderlight models we also offer very high quality crankshafts as original spare parts. We offer both the 54mm stroke and the 57mm stroke version in premium quality. Furthermore, the 57mm 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 roller bearings. Conclusion: The best replacement for the original crankshaft.