BMW R 1100 S 2001 — Specifications

What drove BMW, in the late 1990s, to play the sportbike game with an engine whose cylinders stuck out on each side of the fairing? The answer comes down to three letters: R 1100 S. Produced from 1998 to 2005, the BMW R 1100 S represents Munich's most accomplished attempt to prove that a flat-twin could hold its own against Japanese four-cylinders on sport-touring ground. Not a race replica, no. More of a fast GT dressed in track gear, capable of taking you to a circuit on Sunday and to the office on Monday.

The 1085 cc boxer, with its 98 hp at 7500 rpm and 97 Nm of torque available from 5750 rpm, doesn't try to compete with a CBR 900 RR or a GSX-R 1000 in the rev range. Its nature is different. The flat twin delivers its power generously in the midrange, between 3000 and 5000 rpm, where most real-world road riding takes place. The 11.3:1 compression ratio and four-valve-per-cylinder head give it responsiveness, but past 6000 rpm, the punch fades. The 2001 BMW R 1100 S tops out at 220 km/h — a respectable figure for the era but far from Japanese missiles. The six-speed gearbox and shaft drive, on the other hand, deliver a level of mechanical refinement that chain-driven competitors simply can't match. No tension to check, no lubrication to worry about. You ride, and that's it.

On the chassis side, the BMW R 1100 S spec sheet reveals typically Bavarian choices. The Telelever front end, with 110 mm of travel, filters out imperfections without diving under braking. The Paralever rear end and its sculptural single-sided swingarm offer 130 mm of travel and give the bike a unique visual profile, enhanced by the twin silencers tucked under the seat. The 1478 mm wheelbase and 229 kg wet weight place the machine in a class of its own: too heavy to play purebred sportbike in tight sequences, but formidably stable through fast sweepers. The Brembo braking system, with dual discs up front, proves up to the task. The seat, perched at 800 mm, remains accessible. And the 18-liter tank allows for generous legs between fuel stops.

The BMW R 1100 S Boxer Cup, the version dedicated to the single-make racing series, earned this model its sporting credentials. On forums dedicated to the R 1100 S, long-time owners praise the engine's reliability and the low-maintenance shaft drive, but point to a recurring flaw: vibrations. The flat-twin shakes, especially at steady revs on the highway, and it's the kind of detail that wears on you over long distances. The wind protection delivers on its promises up to 180 km/h; beyond that, you have to deal with turbulence. As for known issues on the BMW R 1100 S, the fuel pump and wiring harness deserve careful inspection on high-mileage examples.

Sold new at 12,600 euros in 2001, the R 1100 S now trades on the used market at prices that vary by model year. The 1999 and 2000 versions can be found around 3,500 euros, while well-maintained 2003 and 2004 models climb to 5,000 euros. The Randy Mamola edition, being rarer, pushes the price higher. Some enthusiasts convert it into a café racer — the flat-twin lends itself well to the exercise with its low profile and exposed cylinders. Whether you're looking for a stock 2002 BMW R 1100 S for Sunday rides or a BMW R 1100 S café racer project, this machine remains a singular proposition. Neither a pure sportbike nor a committed tourer, it carves its own path with the quiet stubbornness of a boxer that refuses to spin like the rest.