In our experience, the original R1150 GS brake lines (not Adventure) are sometimes too short for use with handlebar risers.
This brake line is for the R1150 GS with ABS.
We suggest that you also order the brake line when installing 35mm bar risers. If it turns out that the line is not needed, you can return it for a refund. If your does not have ABS, please order part number 8160903.
If you are installing 25mm risers, there should be no need for a longer brake line.
Tip: Install the handlebar risers first and see if the original line has enough slack throughout the entire range of movement. If so, return the brake line for a refund.