Slipper clutch

A slipper clutch ( in Anglo-Saxon: Slipper clutch or back -torque limiter ) is an original in motorcycling and used in road-legal sports bikes for several years special clutch which transmits the braking force of the engine in overrun mode only due to the rear wheel. See also the article slip clutch.

Generally

When hard braking into a curve and simultaneous rapid downshifting, the engine brake on the rear wheel acts. This may be sufficient to bring the relieved by the dynamic wheel load rear wheel to lock. Here, the described with the English word hopping hopping, jumping or stamping of the rear wheel can occur that can cause the complete loss of adhesion or traction with it. The loss of adhesion of the rear wheel, particularly in an inclined position during cornering, makes the motorcycle unstable up to the uncontrollability. In the worst case, the lateral slipping of the rear wheel leads the rider to fall.

An anti-hopping clutch prevents this return action of the engine brake on the rear wheel and thus allows for normal road traffic safety and on the track better lap times. However, there are racers who deliberately refrain from the use of an anti - hopping clutch, because they have integrated the effect of engine braking in their driving style.

Application

The technique is preferably (Aprilia RSV Mille 1000 cc V -Twin, various Supermoto models, eg, 1098, ) used in large-displacement motorcycles with little cylinders, since in these the torque of the motor brake is strongest and thus the hopping effect is most pronounced occurs. With the steady development of bikes it can today but also in the four-cylinder motorcycles with engine capacity less be useful ( such as the Yamaha YZF- R6 600 cc ), use an anti - hopping clutch. It should be noted that anti-hopping clutches although at V2 engines are important, but were first fitted as standard by the manufacturer in conjunction with R4 engines. Kawasaki here was the undisputed leader with the introduction of a suitable anti-hopping clutch from year 2003. Since 2005 have all athletes and super sports models from Kawasaki this type clutch. The remaining Japanese manufacturers followed. In the meantime, BMW also installed in some of its motorcycles (eg BMW R 1200 GS K50 ) such a coupling.

The clutch is mechanically separated in push mode with a certain torque is exceeded. This, to separate the flow of force necessary, torque can be adjusted on some models. However, there are also other systems (eg Aprilia RSV Mille, Buell 1125R ), which separate on the basis of the resulting negative pressure in the intake tract.

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