## Crankshaft Key 12x5x3mm SG157FMI 4T 125 OHC AC This 12x5x3mm crankshaft key is designed for SG157FMI 4T 125 OHC AC engines, commonly used in scooters and lightweight motorcycles. It provides a precise and secure connection between the crankshaft and other engine components, such as the flywheel or variator. Its careful construction and appropriately selected material guarantee durability and resistance to loads, which translates into trouble-free engine operation. ### Why choose this crankshaft key? * **Perfect fit:** The key is designed specifically for SG157FMI 4T 125 OHC AC engines, ensuring a perfect fit and eliminating the risk of play. * **High quality workmanship:** Made of durable material, resistant to wear and tear and mechanical damage. * **Reliability:** Guarantees stable and safe engine operation. * **Easy installation:** Easy to install, even for less experienced mechanics. ### Technical data: * **Dimensions:** 12x5x3mm * **Compatibility:** SG157FMI 4T 125 OHC AC engines