Tetralever
Tetralever is a two-sided torque support of the rear swing arm on motorcycles with cardan drive , developed by Kawasaki , in order to avoid the motorcycle standing up when accelerating. In the difference z. B. to the Paralever from BMW with one-sided torque support, the erecting forces in the Tetralever are avoided by struts on both sides (above and below) on the swing arms. So far, the Tetralever torque support has only been used on the Kawasaki 1400GTR motorcycle model.
The longitudinally arranged cardan shaft needs a deflection of the drive torque by ninety degrees in order to drive the transversely arranged rear wheel. This redirection is done by a bevel gear on the rear wheel, consisting of housing, pinion on the cardan shaft and ring gear to drive the rear wheel. With this type of power transmission, the acceleration of the motorcycle leads to the rear lifting. The reason for this is a more or less strong "climbing" of the cardan shaft by means of the pinion on the ring gear. When the accelerator is released, the rear of the machine lowers. The two-sided torque support of the Tetralever counteracts these moments and thereby reduces these undesirable effects.