The coupling pinion, the coupling spider and the two bearings or the bronze bushing form one unit. When assembled, the coupling spider should be the highest part. However, it should not protrude more than 0.1 mm.
Otherwise the rear sprocket will tilt, the function of the clutch will not be 100% and the wear on the chain will be higher.
For spacing the clutch spider, MB Developments has put together a shim kit. The kit contains discs in thicknesses 0.15, 0.2, 0.25 and 0.3 mm. This makes it very easy to eliminate unwanted play in the sprocket.
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