75th Anniversary

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Make ModelBMW R 1100RS 75th Anniversary
Year: 1998
Engine: Four stroke, two cylinder horizontally opposed Boxer air/oil-cooled, 4 valves per cylinder
Capacity: 1088
Bore x Stroke: 99 x 70.5 mm
Compression Ratio: 10.3:1
Induction: Fuel injection
Ignition / Starting: Electronic MA 2.2 controlled by Bosch Motronic / electric
Max Power: 90 hp 65.6 kW @ 7250 rpm (Rear Tire: : 84.hp @ 7200 rpm)
Max Torque: 95 Nm @ 5500 rpm
Transmission / Drive: 5 Speed / shaft
Frame: 3 part tubular space Frame: , Engine: serving as load bearing component
Front Suspension: Telescopic fork with hydraulic shock absorber. 200mm wheel travel
Rear Suspension: Long swinging arm with adjustable strut. 125mm wheel travel
Front Brakes: 2x 305mm discs 4 piston calipers
Rear Brakes: Single 285mm disc 2 piston caliper
Front Tire: : 120/70-17
Rear Tire: : 160/60-18
Seat Height800 mm optional seat 780 mm / 800 mm / 820 mm
Wet-Weight: 235 kg
Fuel Capacity: 23 Litres
Consumption average16.6 km/lit
Braking 60 – 0 / 100 – 013.5 m / 40.0 m
Standing ΒΌ Mile 12.1 sec / 177.5 km/h
Top Speed218.7 kmh / Motormag / / BMW / BMW

But with the R1100RS the ‘Boxer’ Engine: (as it is commonly known) has joined the latter half of the 20th Century. It is still air cooled, but the number of valves per cylinder has been doubled to four, and their camshafts are now actuated by a series of belts driven from the crankshaft. The old Bing carburettors, always a distinctive feature of the two-valve Boxer, have also been replaced – the R1100RS is the first Boxer to feature electronic fuel-injection. But if all that is a major departure, the innovative ‘Telelever’ Front Suspension: system of the R1100RS is a quantum leap into the next century for the German marque. Just as Yamaha has looked at alternative Front Suspension: and steering systems for motorcycles, BMW has also taken the brave step of introducing their own solution to the problem.

And that problem is that ideally the steering and suspension systems for a motorcycle’s front end should be separate and independent from each other. Traditional telescopic forks flex, the steering geometry of the machine is altered when the front brake is being used, and often much of the fork’s movement is taken up with braking, leaving little to deal with bumps in the road. Yamaha’s solution to the problem is the hub-centre-steered GTS 1000, but BMW have taken a lower-key approach.

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