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. http://r1150r.org 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.