Using these AS3 Performance crash bars on your 1999 - 2003 BMW F 650 GS is easy. First, gather all the parts included in the package - the crash bars, brackets, and bolts. Refer to the fitting instructions that come with it. Mount the brackets to the motorcycle as shown in the instructions and then attach the crash bars. Make sure all bolts are tightened properly. As for maintenance, keep the crash bars clean. You can use a mild soap and water to wipe them down. Avoid using abrasive cleaners that might damage the textured matt black finish. Check the bolts regularly to ensure they're still tight. If you notice any signs of damage, contact us within the 12 - month warranty period.