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Main Torque (Contra) Springs for your GY6 50cc through 250cc Imported vehicle.
The Rear Torque Spring is in charge of how quickly you shift from Slow to Top speed.
A heavier spring will get you a noticeable increase on low end torque by stalling your takeoff just a little and has a nice downshift when you let off the gas which is Great for faster cornering!
Most STOCK VEHICLES come with a 1000RPM main spring. The higher the number, the stiffer the spring, the more rpms you'll get at takeoff.
(Colors may vary)
Choose vehicle size:
Check pictures for proper fit. *Important measurements are the Inner and outer diameters of the Spring. The Length has more to do with Tension than fit and may be taller or shorter than your stock one.