BMW R1100S Motorcycle - Street (1998-2005)

The BMW R1100S, produced from 1998 to 2005, is a distinctive sport-tourer powered by a 1,085 cc flat-twin "oilhead" boxer engine. This air-cooled cylinder and oil-cooled head engine consistently delivered 98 horsepower and 97 Nm of torque, paired with a six-speed transmission.

A key mid-cycle enhancement occurred from December 2002 (for 2003-2005 models), introducing dual ignition with two spark plugs per cylinder to address engine surging. The core engine specifications remained consistent.

Throughout its production, the R1100S was offered in a Standard model, the R1100S Sport (featuring stiffer suspension, a steering damper, and a wider rear wheel), and from 2003 to 2005, the track-focused BoxerCup Replika (BCR). The BCR included performance upgrades like Laser exhausts, braided brake lines, carbon-fiber components, Öhlins suspension, and a shorter paralever torque arm for quicker steering. Later Sport and BoxerCup models also featured matte black engines with silver cylinders. Q: How do I ensure I select the correct parts for my R1100S?

A: Please use the year and edition selector on this page to confirm compatibility for your specific BMW R1100S model.

Maintenance