R90S


Production Model Years
   1974 - 1976

Frame and Engine Numbers

   Frame numbers
    4070001 - 4075054
    4080001 - 4084675
    4090001 - 4093724
    4950001 - 4951005
    4980001 - 4981738
    4990001 - 4991260
    ———
   Engine numbers
    4070001 - 4075054
    4080001 - 4084675
    4090001 - 4093724
    4950001 - 4951005
    4980001 - 4981783
    4990001 - 4991260

Model Specifications
Drivetrain
Displacement898cc
Cylinders2
Bore x Stroke (mm)90 x 70.6
HP @ RPM67 @ 7000
Compression Ratio9.5:1
ValvesOHV, 2 per cylinder
ClutchDry, single plate, cable operated
Transmission5 speed, foot shifted
Final DriveDriveshaft
Running Gear
FrameTubular steel double cradle
Front SuspensionHydraulically damped telescopic fork
Rear SuspensionTwin shock swingarm
Front BrakesDual ATE 260mm disc with single piston
Rear Brakes200mm drum, single leading shoe
Electrical
IgnitionBattery/coil
Spark PlugsBosch W5DC
GeneratorBosch G1 14 13V 21A 280W
Capacities & Measurements
Weight220kg
Fuel24l
Wheelbase1465mm
Top Speed200kph
Number Produced17465
Serial numbers in 4070001 - 4093724 were delivered outside the US; 4950001 - 4991260 were US only.

The information provided here was obtained from a variety of public sources and may not reflect official BMW archival data.
Please contact the BMW Archives for official data regarding models.