## Rocker Arm Bridge for Long Valves 69-70mm 139QMB/QMA (GY6 50) 4T This rocker arm bridge is an essential component for any GY6 4T engine in 50cc scooters and motorcycles. Designed specifically for long valves (69-70mm), it ensures optimal valve train operation and maximum performance for the 139QMB/QMA engine. Precision manufacturing and high-quality materials guarantee long life and trouble-free operation. ### Why choose this rocker arm bridge? * **Compatibility:** Perfectly fits 139QMB/QMA (GY6 50) 4T engines. * **Long Valves:** Designed specifically for long valves with a length of 69-70mm, which is crucial for proper engine operation. * **Durability and Longevity:** Made of high-quality materials, resistant to wear and high temperatures. * **Easy Installation:** Simple installation that does not require specialized tools. * **Improved Performance:** Ensures optimal valve train operation, which translates to better engine performance. **Note:** Make sure you are ordering the correct bridge for your engine. 139QMB engines used two valve lengths: short (64mm) and long (69mm). Verify your valve length before ordering.