What David said.
Though just remember Don's instruction are for aftermarket shocks with more tuning options, and I can't confirm that the sag measurements he lists are exactly the same for the R1150R since it's for a 12R, I just don't remember. One would think, but it might be worth investigating over here on the 1150R forum or maybe in the 1150r manual.
Also, if you can't get the right sag measurement it's possible you need different springs, depending on your weight.
With the suspension setup right, the R feels like it's on rails and very planted.