BMW R 80/7 (1980-84)

BMW R 80/7 (1980-84)

The BMW R80/7, a mid-range marvel that evolved from the R75, boasts a robust engine character, evident in its 9:1 compression ratio and S model specification. With a duplex endless timing chain and contact breakers, this bike exudes a sense of reliability and durability.

On the road, the R80/7’s engine purrs smoothly, its torquey nature making it a joy to ride in a variety of conditions. The addition of a second front disc brake in response to British police feedback has significantly enhanced its braking capabilities.

The bike’s low-tech and low-stressed design has proven to be a hallmark of BMW’s engineering philosophy, resulting in remarkably long engine life.

Key Specifications

Engine TypeFour stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.
Engine Capacity797.5 cc / 48.7 cu in.
Max Power55 hp / 40 KW @ 6500 rpm
Max Torque64 Nm / 6.5 kgf-m / 47 ft lb @ 5500 rpm
Fuel Tank Capacity24 Litres / 6.3 gal
Weight (Wet/Kerb)473 lbs / 215 kg
Seat Height31.9 inches / 810 mm
BMW R 80/7 (1980-84)

All Specifications

Make & Model

ModelBMW R 80/7
Year1980-84

Engine

Engine TypeFour stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.
Displacement797.5 cc / 48.7 cu in.
Bore x Stroke84.8 x 70.6 mm
Compression Ratio9.2:1
Max Horsepower55 hp / 40 KW @ 6500 rpm
Max Torque64 Nm / 6.5 kgf-m / 47 ft lb @ 5500 rpm
Engine Management System2 x Bing constant depression carburetors
Cooling SystemAir cooled

Performance

Top Speedn/a

Transmission

ClutchDry single plate, with diaphragm spring
Gearbox5 Speed
Gear Ratios1st 3.38 / 2nd 2.43 / 3rd 1.93 / 4th 1.67 / 5th 1.50
Final DriveShaft

Electrical & Electronics System

StarterElectric

Chassis & Suspension

Front SuspensionTelescopic hydraulic forks.
Front Suspension Travel7.3 inches / 200 mm
Rear SuspensionLong swinging arm with adjustable strut.
Rear Suspension Travel4.9 inches / 125 mm

Wheels & Brakes

Front Wheel/Rim Size1.85 – B19
Front Tire Size3.25 – H19
Rear Wheel/Rim Size2.50 – B18
Rear Tire Size4.00 – H18
Front Brakes2 x ∅260mm discs,1 piston caliper
Rear BrakesSingle ∅200mm Drum

Dimension & Weights

Seat Height31.9 inches / 810 mm
Wheelbase57.67 inches / 1465 mm
Ground Clearance165 mm / 6.49 in
Fuel Tank Capacity24 Litres / 6.3 gal
Wet (kerb/curb) Weight473 lbs / 215 kg

Features

  • Bored-out R75 engine
  • Duplex endless timing chain
  • Contact breakers
  • Mechanical advance/retard
  • Wire wheels
  • Single front disc
  • Solid shaft
  • Second front disc
  • Beefed up front suspension
  • S model engine with 9:1 compression ratio
  • Kinematics gearchange
  • Cast wheels
  • Brembo brake calipers
  • Twin-bulb rear light
  • Single-row timing chain with split link
  • Remotely driven ignition
  • Cam-type shock absorber on shaft drive
  • Low-tech and low-stressed engine design
  • Long-lived engine

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