This is from the site Bring a Trailer (https://bringatrailer.com/) ...
This 1990 BMW R100GS is finished in Marrakech Red and powered by a 980cc boxer twin mated to a 5-speed transmission with shaft drive to the rear wheel. The bike is equipped with factory panniers, tail bag mounts, and bash guards, as well as factory graphics. The seller recently acquired the bike from its prior owner of 18 years, and has since serviced the engine’s top-end and had the gearbox fitted with an updated output shaft circlip by Virginia Motorrad. New tires of the buyer’s choice will be fitted prior to delivery. This R100GS is offered at no reserve with an owner’s manual, tool roll, and a South Carolina title in the seller’s name.
The R100GS was equipped with a six-gallon steel fuel tank and plastic fenders and side panels. This example is finished in Marrakech Red, one of three colors available for the model’s final year of production. Suspension consists of a rear Paralever swingarm with mono-shock, and a set of 40mm Marzocchi front forks. The bike retains a factory center stand, and a set of factory pannier cases are included.
The bike is equipped with factory spoked wheels measuring 21″ at the front and 17″ at the rear. The wheels are equipped with factory hooked Akront rims, which allow use of tubeless tires. Braking is handled by a single front disc and a rear drum. The seller notes that the fitted tires are older, and new tires of the buyer’s choice will be mounted and balanced prior to delivery.
A set of black plastic hand guards are fitted to the motocross-style handlebars. The bikini faring shields a 120-mph speedometer and an array of warning lights. The 5-digit odometer shows approximately 26,600 miles.
The 980cc boxer twin was factory-rated at 60 horsepower and is fitted with dual 32mm Bing carburetors. An external oil cooler is mounted to the front bash bar. The seller disassembled the top ends and performed a re-seal, including new pushrod tube seals, head gaskets, cylinder o-rings, and an inspection of the valvetrain.
A cold-start video is viewable above. The seller also rebuilt the carburetors, adjusted the valves, re-torqued the heads, and changed the fluids. Corrosion is noted atop the exhaust collector box.
The seller inspected the transmission for inspection, and sent it to Antoine Largiader of Virginia Motorrad for the c-clip modification and a re-seal. The driveline was also cleaned and vapor blasted prior to re-assembly on the bike.
The factory rider’s manual is pictured above, and the seller notes that the factory tool roll and underseat storage tray are intact.
A six-minute walk-around video is viewable above, and a riding video is viewable below.