The BMW R 90/6 embodies the essence of BMW’s shift towards a more sporting image, while maintaining its reputation for elegance and comfort.
With its distinctive horizontally-opposed flat twin engine, the R 90/6 boasts a unique layout that sets it apart from its competitors.
The engine’s driveshaft is a clever innovation, providing a smooth and efficient power delivery that belies its size and weight.
As you settle into the saddle, the R 90/6’s comfortable riding position and refined ergonomics become apparent, making it an ideal companion for both daily commuting and spirited riding.
The result is a bike that combines the best of both worlds: the civility of a BMW, with the excitement of a high-performance machine. The BMW R 90/6 is a true reflection of the brand’s sporting aspirations, and a testament to its commitment to creating motorcycles that are both exceptional and desirable.
Key Specifications
Engine Type
Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.
Engine Capacity
898 cc / 54.8 cu in.
Max Power
44.1 kw / 60 hp
Max Torque
73 Nm / 7.44 kgf-m / 53 ft lb @ 5500 rpm
Fuel Tank Capacity
18 Liters /4.75 US gal
Weight (Wet/Kerb)
462 lbs / 210 kg
Seat Height
31.9 inches / 810 mm
*n/a – information not provided by manufacturer
All Specifications
Make & Model
Model
BMW R 90/6
Year
1973 – 76
Engine
Engine Type
Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.
Displacement
898 cc / 54.8 cu in.
Bore x Stroke
90 x 70.6 mm
Compression Ratio
9.0:1
Max Horsepower
44.1 kw / 60 hp
Max Torque
73 Nm / 7.44 kgf-m / 53 ft lb @ 5500 rpm
Engine Management System
2 x Bing constant depression carburetors
Lubrication System
Gear driven pump
Cooling System
Air cooled
Performance
Top Speed
n/a
*n/a – information not provided by manufacturer
Transmission
Clutch
Dry single plate, with diaphragm spring
Gearbox
5 Speed
Final Drive
Shaft
Electrical & Electronics System
Starter
Electric
Chassis & Suspension
Frame Type
Double loop tubular frame with bolt on rear section
Front Suspension
Telescopic hydraulic forks.
Front Suspension Travel
8.1 inches / 208 mm
Rear Suspension
Long swinging arm with adjustable strut.
Rear Suspension Travel
4.9 inches / 125 mm
Wheels & Brakes
Front Wheel/Rim Size
1.85 – B19
Front Tire Size
3.25 – H19
Rear Wheel/Rim Size
2.15 – B18
Rear Tire Size
4.00 – H18
Front Brakes
Single ∅260mm disc, 1 piston caliper
Rear Brakes
200mm Drum
Dimension & Weights
Seat Height
31.9 inches / 810 mm
Wheelbase
57.67 inches / 1465 mm
Fuel Tank Capacity
18 Liters /4.75 US gal
Wet (kerb/curb) Weight
462 lbs / 210 kg
Features
Double loop tubular frame
Bolt on rear section
Horizontally-opposed flat twin engine
Driveshaft instead of chain or belt
Large airbox for cooling
Horizontal cylinders for cooling
29 inches wide engine
90mm bore, 70.6mm stroke
Overhead valves
180-degree crankshaft for counterbalanced pistons
Constant-velocity 32mm Bing carburetors
Electric starter
Back-up non-primary kick starter
Alternator and points mounted under engine cover
Plastic hoses connect carbs to airbox
Oil tank is integral to engine cases
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*We strive to provide the most comprehensive and accurate specifications possible. However, certain details may not be available if the manufacturer did not disclose them or if the information is no longer publicly accessible. If you find any discrepancy with any data on this site, please feel free to let us know at contact@throttlecraze.com
