## Crankshaft, Piston Pin 13mm, 16 Teeth 139QMB/QMA (GY6 50) 4T - High Quality for Your Scooter This high-quality crankshaft is designed specifically for popular Chinese four-stroke scooters with GY6 engines. Manufactured according to original dimensions, it guarantees a perfect fit and reliability. ### Key Features: * **Complete Set:** The crankshaft is supplied with bearings and a camshaft sprocket, making installation easier and saving you time. * **Precise Dimensions:** The counterweight diameter is 84.5mm and the connecting rod length is 107.4mm, ensuring optimal engine operation. * **Durable Bearings:** The 6204 and 6303X3-3/C3 bearings used are characterized by high durability and load resistance, which translates into a long crankshaft life. * **Oil Pump Compatibility:** The shaft has 16 teeth driving the oil pump, which is crucial for proper engine lubrication and trouble-free operation. Make sure this version is suitable for your model. ### Why choose this crankshaft? Investing in a high-quality crankshaft is an investment in the long and trouble-free operation of your scooter. This crankshaft offers an excellent price-performance ratio, ensuring reliability and efficiency. **Note:** In Chinese four-stroke engines, there are two types of crankshafts, differing in the number of teeth driving the oil pump. This shaft has 16 teeth. Check compatibility with your model before purchasing.