I mounted lights on a 1997 R1100GS using 3/4 inch diameter, 1/16 inch thick, square section aluminum tubing I bought at Home Depot for about $10. Easy to cut to length, drill holes etc. Covered with shrink wrap for a nice looking, chip-proof finish and plugged the ends with plastic caps. The bar attaches to the underside of the oil cooler which is way out in front on the GS behind the "duck bill".
A forum community dedicated to BMW Luxury Touring motorcycle owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, reviews, and more!