I have Ohins on my R1200R. The adjuster that came with it was impossible to use. Knob was too small. Hard to turn, lots of turns to make a big adjustment.They also offer a Stage 4 unit.
The Black-T Stage4 shock absorber is a real suspension upgrade for your BMW R18. The Black-T hydraulic spring preload allows easy and precise adjustment of the motorbike - balance to your requirements. The Stage4 shock absorber's balancing reservoir enashop.touratech.com