BMW K75S (1985-86)

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The BMW K75S motorcycle was produced in 1985-86 with over 18,000 units made. It has a four-stroke, horizontal three cylinder in-line engine with a capacity of 740 cc/45 cub. in. It has electronic injection with a Bosch LE-Jetronic and a wet sump lubrication system. The bike can reach a max power of 55 kW/75 hp @ 8500 rpm and a max torque of 68 Nm/6.9 kgf-m/50 ft lb @ 6750 rpm. It has a 5 speed transmission with a single dry plate clutch and shaft final drive. The frame is a double-downtube frame with the engine as a stressed member and a box-section aluminum monolever swing arm. The front suspension is a telescopic fork with a hydraulic shock absorber and the rear suspension is a monolever swinging arm. The bike has front and rear disc brakes and a front tyre size of 100/90-18 and a rear tyre size of 130/90-17. It has a fuel capacity of 21 liters/ 5.54 US gal, and a fuel consumption rate of 4 l/100 km/25 km/l/59 US mpg. The bike can reach a top speed of 210 km/h/131 mph and an acceleration rate of 0-100 km/h/62mph in 4.7 seconds. The dimensions of the bike are 2220 mm/87.4 in length, 900 mm/35.4 in width, and 1340 mm/51.2 in height with a seat height of 810 mm/31.9 in or 760 mm/29.9 in for the low seat model. The dry weight of the bike is 229 kg/505 lbs and the wet weight is 235 kg/518 lbs with a ground clearance of 175 mm/6.9 in.

Technical specifications:

Make Model: BMW K75S

Year: 1985 -86


Production: 18000+ units
Engine: Four-stroke, horizontal three cylinder in-line, DOHC, 2 valves per cylinder
Capacity: 740 cc / 45 cub. in.
Bore x Stroke: 67 x 70 mm
Compression Ratio: 11.0:1
Cooling: Liquid cooled
Lubrication: Wet sump
Induction: Electronic injection, Bosch LE-Jetronic
Starting: Electric
Max Power: 55 kW / 75 hp @ 8500 rpm
Max Torque: 68 Nm / 6.9 kgf-m / 50 ft lb @ 6750 rpm
Transmission: 5 Speed
Clutch: Single dry plate
Final Drive: Shaft
Gear Ratios: 1st 4.50 / 2nd 2.96 / 3rd 2.30 / 4th 1.88 / 5th 1.67:1

Frame: Double-downtube frame with engine as a stressed member; box-section aluminum monolever swing arm.
Front Suspension: Telescopic fork with hydraulic shock absorber.
Front Wheel Travel: 185mm / 7.3 in.
Rear Suspension: Monolever swinging arm.
Rear Wheel Travel: 114mm / 4.5 in.
Front Brakes: 2 x 285mm discs, 2 piston calipers
Rear Brakes: Single 285mm disc
Front Tyre: 100/90-18
Rear Tyre: 130/90-17
Dimensions: Length 2220 mm / 87.4 in. Width 900 mm / 35.4 in. Height 1340 mm / 51.2 in.
Wheel Base: 1516 mm / 59.7 in.
Seat Height: 810 mm /31.9 in. or 760 mm / 29.9 in. for low seat model
Ground Clearance: 175 mm / 6.9 in.
Dry Weight: 229 kg / 505 lbs
Wet Weight: 235 kg / 518 lbs
Fuel Capacity: 21 liters / 5.54 US gal
Fuel consumption: 4 l/100 km / 25 km/l / 59 US mpg
Acceleration 0 – 100 km/h / 62 mph: 4.7 sec.
Top Speed: 210 km/h / 131 mph

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