Installation instructions are same for all bikes (790/890/1090/1190/1290 Adventure R/S).
1. Unbolt 4 bolts and remove OEM luggage rack plate.
2. Place four spacers above the holes.
3. Install the rack back on, using same bolts.
4. Tighten the bolts, in alternating pattern. Torque to 20 Nm.
5. After first few hundred kilometers with rack installed, check the bolts and re-tighten if needed.