The venerable BMW R100RS was designed by Hans Muth for the 1977 model year, and based on a 980cc engine, an upgrade from the classic R90S's 898cc. Looking modern in the late 70's the frame-mounted fairing allows all weather riding and increases stability to allow a top speed of almost 125mph. The supple ride rewards smooth riding, tucked into the fairing listening to the quiet whir from below.
This particular machine was a mechanic's love affair:
The bike started out as a 1986 R80RT, that was converted to an RS. The original motor was sold to help pay for the rebuild, and the builder started with a used 1978 R80 motor bottom end off our shelf.
The comprehensive rebuild included an engine with the RS's larger valves, dual-plug heads, Nikasil cylinders, 40 mm Bings, and factory sport cam. Additionally a stainless custom exhaust was fabricated.
Over 3 years, the mechanic upgraded and rebuilt every sub-system, replacing the clutch, upgrading the starter, and replacing all the bushings and bearings in the transmission and final drive. Steering head and forks were rebuilt, and a new fork brace and rear shock installed. Brake calipers were rebuilt and push EBC floating rotors.
The list of new parts is pretty surprising, and the fairing was not neglected, a bright yellow with well-coordinated stripes and lowers in black. With distinctive Motorsport badges all around, it makes a splash.
Again from the ad:
After turning 3700 miles, it was parked for a few years and has returned to the shop to have the carbs cleaned, fuel tank lined, and a general inspection. A 1986 version of a model that went out of production in 1984, it will never be destined for a "collection", this tribute to the ground-breaking design is a rider, and appears ready to go.