1973 BMW R90S
The 1973 1973 BMW R90S packs a 898cc OHV flat-twin engine with 67hp into a sport bike package from BMW.
Specifications
Engine
- Type
- OHV flat-twin
- Displacement
- 898 cc
- Cylinders
- 2
- Power
- 67 hp @ 7000 rpm
- Torque
- 68.0 Nm
- Compression
- —
- Bore × Stroke
- 90.0 × 70.6 mm
- Cooling
- Air-cooled
- Fuel System
- 2x Dell'Orto carburetors
Chassis & Transmission
- Frame
- Steel double cradle
- Front Suspension
- Telescopic fork
- Rear Suspension
- Twin shock
- Front Brake
- Dual disc
- Rear Brake
- Single disc
- Front Tyre
- —
- Rear Tyre
- —
- Transmission
- 5-speed
- Final Drive
- Shaft
Performance
- Top Speed
- 200 km/h (124 mph)
- ¼ Mile
- —
Dimensions & Weight
- Dry Weight
- 200 kg (441 lbs)
- Wet Weight
- 215 kg (474 lbs)
- Seat Height
- 810 mm
- Wheelbase
- 1465 mm
- Ground Clearance
- —
- Fuel Capacity
- 17.0 L
History & Story
BMW's 1973 BMW R90S arrived in 1973 as a sport bike designed for the discerning rider. Produced in Germany, it quickly earned recognition as a capable sport bike from the 1970s.
The 1973 BMW R90S is motivated by a 898cc OHV flat-twin twin-cylinder unit delivering 67hp at 7000 rpm. Breathing through 2x Dell'Orto carburetors and kept cool by air-cooled, the engine drives through a 5-speed transmission with shaft final drive.
The chassis employs a steel double cradle frame with telescopic fork up front and twin shock at the rear. Stopping power comes from dual disc front and single disc rear brakes. Tipping the scales at 200 kg (441 lbs) dry, the 1973 BMW R90S offers a manageable riding experience with a 1465 mm wheelbase.
Performance-wise, the 1973 BMW R90S achieves a claimed top speed of 200 km/h (124 mph). With a generous fuel capacity of 17.0 liters, it offers reasonable range for sport bike duties. The seat height of 810 mm makes it comfortable for most riders.
Today, the 1973 BMW R90S is considered a highly sought-after classic that commands strong prices among collectors worldwide. Parts availability is rated as good, making ownership relatively straightforward. It remains an icon of BMW motorcycling from 1970s.
The 1973 BMW R90S is motivated by a 898cc OHV flat-twin twin-cylinder unit delivering 67hp at 7000 rpm. Breathing through 2x Dell'Orto carburetors and kept cool by air-cooled, the engine drives through a 5-speed transmission with shaft final drive.
The chassis employs a steel double cradle frame with telescopic fork up front and twin shock at the rear. Stopping power comes from dual disc front and single disc rear brakes. Tipping the scales at 200 kg (441 lbs) dry, the 1973 BMW R90S offers a manageable riding experience with a 1465 mm wheelbase.
Performance-wise, the 1973 BMW R90S achieves a claimed top speed of 200 km/h (124 mph). With a generous fuel capacity of 17.0 liters, it offers reasonable range for sport bike duties. The seat height of 810 mm makes it comfortable for most riders.
Today, the 1973 BMW R90S is considered a highly sought-after classic that commands strong prices among collectors worldwide. Parts availability is rated as good, making ownership relatively straightforward. It remains an icon of BMW motorcycling from 1970s.
Known Issues
- Final drive spline wear on shaft-drive models
- Pushrod tube seal leaks
- Rocker arm wear
- Starter motor brushes wear over time
Fun Facts
- Pristine examples of the 1973 BMW R90S can command six-figure prices at auction
- The 1973 BMW R90S is considered one of the most collectible motorcycles from BMW
- The 1973 BMW R90S is widely regarded as a milestone in motorcycle history
Collector Information
- Parts Availability
- Good
- Collector Rating
- 9/10
Resources & Parts
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