Series IV, lightweight version now with centring sleeves between cylinder head and one-piece spindle support.
suitable for models from /6 (10.1975 ) to R 100 R.

Makes enlarging axial play during operation due to movement of the individual supports a thing of the past, one-piece rocker spindle supports without axial play for mounting all rocker arms from /6 models.
The support is mounted on its broad side on the cylinder head and is fixed by centring sleeves to the head. The rocker arm no longer suffers from axial displacement.
The usual axial play is removed and with it the related valve noise.