BMW R 1100 S - 1999 Specifications and Reviews
The 1999 BMW R 1100 S is a sport-touring boxer that appeals to riders seeking thrilling performance with practical versatility. Its potent 1085cc engine delivers 98 horsepower and impressive acceleration, while the shaft drive and comfortable ergonomics make it equally suited for long-distance touring. Known for agile handling and BMW's signature reliability, it perfectly balances sportiness with everyday usability.
About the BMW R 1100 S
Powered by an air and oil cooled 1,085.00cc Boxer flat twin cylinder four stroke engine, producing 98bhp.
The engine is derived from the R1100RS although the compression ratio has been tweaked along with changes to the air intake and forged connecting rods to increase the top speed and power.
Power is delivered to the rear wheel via shaft drive and the engine is a stressed member of the frame, just like the R1100RS
The look is unique with the single sided swingarm, low down Boxer engine, dual under seat exhaust system and asymmetrical headlights.
Optional extras include 12V socket, 5.5" rear wheel (+0.5") with 180/55 tyre, engine spoiler, sports suspension set-up, tall screen, high handlebars, 2-level heated grips, hard panniers and ABS II.
Timeline
2002: Front discs were enlarged to 320mm.
BoxerCup Replica (2003): Main differences over the base bike are a revised fourth gear ratio from, wider 5.5" rear wheel with 180/55 tyre, engine spoiler, 60mm higher seat, Metzeler Sportek M1 tyres and Laser exhausts. Like the racing machines it also has a raised chassis with longer spring struts and Carbon Fiber Reinforced Plastic (CFRP) cylinder head covers.General information | |
| Category | Sport touring |
| Year | 1999 |
| Model | BMW R 1100 S |
| | |
Engine and Transmission Specifications | |
| Greenhouse gases | 14.8 CO |
| Fuel consumption | 0.64 litres/100 km (156.3 km/l or 367.53 mpg) |
| Transmission type,final drive | Shaft drive (cardan) |
| Gearbox | 6-speed |
| Cooling system | Oil & air |
| Bore x stroke | 99.0 x 70.5 mm (3.9 x 2.8 inches) |
| Compression | 11.3:1 |
| 60-140 km/h (37-87 mph), highest gear | 10.200 seconds |
| 0-100 km/h (0-62 mph) | 3.700 seconds |
| Top speed | 220.0 km/h (136.7 mph) |
| Torque | 97.00 Nm (9.9 kgf-m or 71.5 ft.lbs) @ 5750 |
| Power | 98.00 |
| Engine type | Two cylinder boxer, four-stroke |
| Capacity: | 1085.00 ccm (66.21 cubic inches) |
Brakes, suspension, Frame and wheels | |
| Rear brakes diameter | 276 mm (10.9 inches) |
| Rear brakes | Single disc |
| Front brakes diameter | 310 mm (12.2 inches) |
| Front brakes | Dual disc |
| Rear tyre dimensions | 170/60-ZR17 |
| Front tyre dimensions | 120/70-ZR17 |
| Rear suspension travel | 130 mm (5.1 inches) |
| Front suspension travel | 110 mm (4.3 inches) |
| | |
Physical measures and capacities | |
| Fuel capacity | 18.00 litres (4.76 gallons) |
| Wheelbase | 1,478 mm (58.2 inches) |
| Seat height | 800 mm (31.5 inches) If adjustable, lowest setting. |
| Front percentage of weight | 50.6 |
| Weight incl. oil, gas, etc | 236.0 kg (520.3 pounds) |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Starter | Electric |
Performance Profile & Rider Fit
Best For
Rider Profile
| Best For | Best suited to intermediate or experienced riders who can appreciate the boxer engine's distinct character and shaft-drive handling quirks. |
| Purpose | Designed as a sport tourer, blending brisk boxer-twin performance with long-distance comfort and shaft-drive practicality. |
| Rider Fit | The 800mm seat height and moderate 229kg wet weight make it manageable for most adult riders, though the low-speed maneuvering requires some confidence. |
| Character | A quirky, characterful machine with torque-rich boxer power delivery, Telelever front suspension feel, and sporty yet composed road manners. |
| Not Ideal For | Not a good fit for off-road adventures or riders seeking a lightweight, flickable city commuter. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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