## Left Crankcase, 430mm, 12" Wheels, 729mm Belt 139QMB/QMA (GY6 50) 4T This left crankcase is a high-quality replacement part for scooters with 139QMB/QMA (GY6 50) 4T engines. Designed for 12" wheels and a 729mm belt, it fits perfectly with models having a 430mm case length. It ensures reliability and durability, essential for a smooth and safe ride. ### Key Product Features: * **Precise Fit:** The crankcase has been precisely manufactured, guaranteeing a perfect fit for scooters with 139QMB/QMA (GY6 50) 4T engines. * **Durable Construction:** Made of robust materials, the crankcase is resistant to damage and wear, ensuring long-lasting performance. * **Compatibility:** Dedicated to 12" wheels and a 729mm belt, as well as models with a 430mm case length. * **Easy Installation:** Designed for simple and quick installation, minimizing time and effort. ### Why Choose This Crankcase? Investing in a solid crankcase is an investment in safety and riding comfort. This product offers not only a precise fit and durability, but also peace of mind, knowing your scooter is equipped with high-quality components. Choose this crankcase to enjoy trouble-free riding for a long time.