Rear swingarm for Viper 125-200 cc motorcycles and similar (China, Minsk). The swingarm is the rear fork on which the rear wheel is mounted. It is hinged to the frame and, together with the shock absorbers, absorbs road irregularities.
Replace it if it is bent, the welds have cracks, the seats have play and the wheel is misaligned. A bent swingarm impairs handling, and worn bushings cause knocking.
A different-shape version for Viper 125A-150J, Chinese swingarm, Minsk. It differs in shape from the standard one: compare.
