The gear shift shaft for Viper 125-200 cc motorcycles and similar (China, Minsk) transfers motion from the lever to the gear selector mechanism in the gearbox.
Replace it if the splines are worn or the spring is broken: gears engage imprecisely and the lever does not return. Also check the shift forks.
- While you are at it, inspect the neighboring parts of the assembly: they often wear out together.
