## Complete Piston 39.00/13/17.20 50cc 139QMB/QMA (GY6 50) 4T - Reliability and Performance This complete piston 39.00/13/17.20 guarantees long and trouble-free operation of your 50cc 139QMB/QMA (GY6 50) 4T scooter engine. Designed for performance and durability, it offers optimal operating parameters, ensuring a smooth and dynamic ride. ### Advanced Design Additional lubrication holes in the piston minimize friction and wear, contributing to a longer engine life. Precise manufacturing and high-quality materials guarantee a perfect fit and seal, resulting in better compression and efficient fuel consumption. ### Complete Set The set includes rings, a wrist pin, and circlips, eliminating the need to purchase additional components. This comprehensive solution saves time and money. ### Technical Parameters: * Piston diameter: 39.00mm * Wrist pin diameter: 13mm * Distance from wrist pin axis to piston edge: 17.20mm * Cylinder capacity: 50cm³ This piston is the ideal choice for anyone who values reliability, performance, and ease of installation.