This is from the site Bring a Trailer (https://bringatrailer.com/) ...
This 1982 BMW R100RT was sold new at Country Cycle Shop in Montoursville, Pennsylvania and was acquired by the seller 3 years ago from the believed first owner. The bike is powered by a 980cc opposed twin with a 5-speed transmission and shaft drive, and the seller has fitted new handlebars, shocks, and a fresh battery. In preparation for sale the seller cleaned the carburetors, re-torqued the cylinder heads, and adjusted the valves. 29k miles are shown, of which the seller has added approximately 2,500. This R100RT is now offered at no reserve with the factory tool kit, owner’s manual, and a clean South Carolina title in the seller’s name.
The bike is finished in black with red and white striping, and the seller has replaced the handlebars and added aftermarket Ikon shocks. Stone chips are noted on the fairing, along with paint blemishes near the base of the left mirror and spider cracks on the lower corner of the windscreen. The paint at the rear of the fuel tank is worn from contact with the seat, which the seller notes is visible only when the seat is open.
Instrumentation consists of an 85-mph speedometer, a tachometer with a 7k-rpm redline, a volt meter, and a clock. The fairing also contains ventilation and dual storage compartments. 29k miles are shown on the odometer.
The front end features Brembo brakes with dual drilled discs and fresh brake fluid. BMW cast alloy “snowflake” wheels wear Avon Road Rider tires that are reportedly less than one year old.
The air-cooled 980cc opposed twin was factory rated at 70 horsepower and features dual 40mm Bing carburetors. A 5-speed transmission transfers power though a drive shaft to a 32/11 final drive. Recent work performed by the seller included cleaning and synchronizing the carburetors, re-torqing the cylinder heads, and adjusting the valves. An Odyssey battery was fitted, and the oil pan gasket and lubricants replaced. No service records are available, but the prior owner kept notation of the services performed in the owner’s manual. Walk around, cold start, and riding videos are provided below.