Gilles AXB Chain Tensioner Yamaha YZF-R6/RJ27 2017-

High-precision adjust the chain voltage possible.
Special screw allows axle adjustment in both directions.
Model-specific shape.
High reading accuracy through precise scaling. 
Scaling can compensate for serial tolerances.
Stays in the swing with rear wheel assembly.
Support of the axis against pulling and pressure forces.
Can be used with original axle mother.