These are the known mechanical and performance specifications for your 2005 BMW R 1100 S.
Basic Specs

Engine
Displacement1085.00 ccm (66.21 cubic inches)
Type
DetailsTwo cylinder boxer, four-stroke
Max RPM
Compression11.3:1
Bore/Stroke99.0 x 70.5 mm (3.9 x 2.8 inches)
Valves/Cylinder4
FuelingInjection. Electronic intake pipe injection/digital engine management: Bosch Motronic MA 2.4 with overrun fuel cut-off, twin spark ignition
Ignition
Exhaust
Lubrication
CoolingOil & air
Drivetrain
Gearbox6-speed
Final DriveShaft drive (cardan)
ClutchSingle-disc dry clutch, hydraulically operated
Driveline
Performance
Horespower96.55 HP (70.5 kW)
Torque97.00 Nm (9.9 kgf-m or 71.5 ft.lbs)
Top Speed
Fuel Economy & Polution
Fuel Consumption4.30 litres/100 km (23.3 km/l or 54.70 mpg)
Fuel Capacity18.00 litres (4.76 gallons)
Emissions99.8 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame TypeThree-section composite frame consisting of front and rear section, load bearing engine.
Rake25.0°
Trail100 mm (3.9 inches)
Front SuspensionBMW Motorrad Telelever
Front Travel35 mm (1.4 inches)
Rear SuspensionDie-cast aluminium single-sided swinging arm with BMW Motorrad Paralever
Rear Travel135 mm (5.3 inches)
Seat
Seat Height800 mm (31.5 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1,160 mm (45.7 inches)
Total Length2,180 mm (85.8 inches)
Total Width880 mm (34.6 inches)
Ground Clearance
Wheelbase1,478 mm (58.2 inches)
Dry Weight208.0 kg (458.6 pounds)
Wet Weight229.0 kg (504.9 pounds)
Wheels & Brakes
Front Tire/Tyre120/70-ZR17
Rear Tire/Tyre170/60-ZR17
Front BrakesDouble disc
Front Brake Diameter305 mm (12.0 inches)
Rear BrakesDouble disc
Rear Brake Diameter276 mm (10.9 inches)
Wheels
Comments
ABS brakes.