R 1100 S

1999 BMW R 1100 S Technical Analysis & Specification Breakdown

At the heart of the 1999 BMW R 1100 S sport touring motorcycle, BMW utilizes a 1085 cc (66.2 cu in) oil & air-cooled two cylinder boxer, four-stroke layout. In factory specification, peak output is rated at 98 HP (71.5 kW) at 7,500 rpm while maximum torque reaches 97 Nm (71.5 lb-ft) at 5,750 rpm, transferring power to the rear wheel through a 6-speed gearbox and shaft drive (cardan) final drive. With a specific output of 90.3 HP per liter and a 1,750 rpm working window between peak torque (5,750 rpm) and peak power (7,500 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the R 1100 S measures 236 kg (520 lbs) wet (curb), translating to a power-to-weight ratio of 0.42 HP/kg (2.41 kg per horsepower). Rider ergonomics and chassis geometry center around a 800 mm (31.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,478 mm (58.2 in) wheelbase engineered for balanced agility and highway composure. The 18-liter (4.8 US gal) fuel tank paired with a rated consumption of 6.4 L/100 km provides an estimated theoretical range of roughly 281 km (175 miles) between fill-ups, while factory top speed is listed at 220 km/h (137 mph).

Within MotoLibrary's BMW archive, this model family spans 7 indexed model years from 1999 to 2005, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.