Crankshaft and connecting rod assembly for STIHL MS660 and MS650 chainsaws – main components for professional large-displacement engines

This product is specifically designed for the STIHL Professional MS660 and MS650 high-performance, large-displacement chainsaws. It conforms to the original factory specifications for series production and includes crankshaft and connecting rod assemblies. These components are essential for transmitting and converting engine power; they transform the linear motion of the piston into rotary motion, thus generating force. This product offers a complete repair solution. It typically includes the crankshaft, connecting rod, and large and small needle bearings (or bushings). This system is designed to replace original crankshaft and connecting rod assemblies that are bent, worn, or unbalanced, or that have suffered bearing damage due to sustained extreme loads, insufficient lubrication, or material fatigue. The fundamental and crucial step in addressing basic engine problems such as loud internal noises, excessive vibrations, significant power loss, starting difficulties, and even engine damage is a complete engine overhaul.