## Complete Cylinder with Head 50.00mm 90cc 13mm Pin EGR 139QMB/QMA (GY6 50) 4T This high-quality complete 90cc cylinder is the perfect solution for your 4-stroke scooter with a 139QMB/QMA (GY6 50) engine. The set includes the cylinder, head, piston, rings, a 13mm piston pin, safety devices, and all necessary gaskets. Made of durable cast iron, it guarantees long and trouble-free operation. ### Durability and Reliability The cast iron cylinder construction provides excellent wear resistance, translating to a longer engine life. The set also includes an aluminum head with complete valves, gaskets, and springs, made of high-quality materials. ### Ideal Replacement and Upgrade This complete cylinder is an excellent replacement for the original part. The increased capacity to 90cc offers a noticeable increase in power and dynamics of the scooter. The set is easy to install and fits perfectly with the indicated engine models. ### Environmentally Friendly The cylinder is equipped with an EGR (Exhaust Gas Recirculation) system, which contributes to reducing the emission of harmful substances into the atmosphere. This system can be blanked off if necessary. ### Technical Parameters: * **Cylinder Capacity:** 90cc * **Cylinder Bore:** 50.00mm * **Piston Pin Diameter:** 13mm * **Cylinder Material:** Cast Iron * **EGR:** Yes