SSP-G Performance QMB139 Torque Spring Base NIU KQi3 Pro Fits 50cc QMB139 and 125cc

Fits 50cc QMB139 and 125cc / 150cc GY6 engine-based scooters

diamond ground and compatible with every type of mountain bike brake pad

high-performance front end with these NCY All-Black Performance Front Forks (Drum Type)

we highly recommend upgrading to Dr

Dynamic Spin Balancing: Precision computer-balanced during manufacturing to eliminate high-RPM vibrations and protect your rear input shaft bearings

SSP-G Performance QMB139 Torque Spring Base NIU KQi3 Pro Fits 50cc QMB139 and 125ccSSP G Performance Torque Spring Base for 50cc QMB139 4 stroke engines and engine based vehicles. The QMB139 Torque Spring Base will allow for smoother torque spring action through the use of roller bearings. This allows the spring to pivot and turn free rather than binding up. The roller bearings reside inside the machined aluminum cup. No more loose ball bearings! Overall Height: 8. 2mm Inner Diameter (Where Spring Sits): 58mm QMB139 50cc 49cc ,