Using your AS3 Performance crash bars is easy. First, gather all the brackets and bolts that come with the bars. Refer to the fitting instructions provided. Mount the crash bars to your 1999 - 2004 BMW R 1150 GS as shown in the picture. Make sure all bolts are tightened properly. When it comes to maintenance, regularly check the bolts to ensure they haven't loosened. You can clean the crash bars with a mild soap and water solution to keep the textured matt black finish looking good. If you notice any damage, contact us within the 12 - month warranty period for assistance.