Is the CB1100 a Sportbike? Ask Freddie.

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If you get rear shocks with a reservoir, at least in the case of Ohlins, you will have to remove or modify the right side grab rail to keep it from interfering with the adjustment knob. I cut the rail down some on a band saw and the sanded and repainted the rail. I followed the existing lines of the rail so you really can't tell it's been modified. Other brands may be an easier fit.