The BMW R 45, a diminutive yet impressive addition to the BMW lineup, has arrived to replace its larger predecessors. Weighing in at 4251b, the R 45 is no lightweight, but its compact size and agile handling make it an attractive proposition for city dwellers and touring enthusiasts alike.
Its 650cc oversquare engine, a testament to BMW’s legendary engineering prowess, delivers a punchy 35bhp in export markets, with peak power achieved at 7250rpm and maximum torque of 27.5lb-ft at 5500rpm. While not the most powerful machine on the road, the R 45’s engine is renowned for its smoothness and efficiency, making it an ideal choice for long-distance travel.
Fuel consumption is a standout feature, with an average figure of 55-60mpg possible, thanks in part to the bike’s large 4.8-gallon fuel tank. The R 45’s transmission is a five-speed gearbox with shaft drive, while braking is handled by a single cross-drilled disc at the front and a powerful drum at the rear. With its impressive standard fittings, including cast-alloy wheels, electric starter, and intercom plug, the BMW R 45 is a thoroughly modern touring machine that’s as refined as it is capable.
Key Specifications
Engine Type
Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.
Engine Capacity
453 cc / 27.6 cu in.
Max Power
20 kw / 27 hp
Max Torque
37.5 Nm 3.8 kgf-m / 27.65 lb-ft @ 5500 rpm
Fuel Tank Capacity
5.8 US gallons / 22.0 L
*n/a – information not provided by manufacturer
All Specifications
Make & Model
Model
BMW R 45
Year
1982 –
Engine
Engine Type
Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.
Displacement
453 cc / 27.6 cu in.
Bore x Stroke
70 x 61.5 mm
Compression Ratio
8.2:1
Max Horsepower
20 kw / 27 hp
Max Torque
37.5 Nm 3.8 kgf-m / 27.65 lb-ft @ 5500 rpm
Engine Management System
2 x Bing V65 carburetors
Cooling System
Air cooled
Performance
Top Speed
n/a
*n/a – information not provided by manufacturer
Transmission
Gearbox
5 Speed
Final Drive
Shaft
Electrical & Electronics System
Chassis & Suspension
Front Suspension
Telescopic hydraulic forks
Rear Suspension
Long swinging arm with adjustable strut
Wheels & Brakes
Front Tire Size
1.85 – B18
Rear Tire Size
2.50 – B18
Front Brakes
2 x 260mm Discs, 2 piston caliper.
Rear Brakes
Single 200mm drum
Dimension & Weights
Fuel Tank Capacity
5.8 US gallons / 22.0 L
Dry Weight
185 kg / 408 lbs
Features
2 stages of engine tune
26bhp for German market
35bhp for rest of the world
Peak power at 7250rpm
Maximum torque at 5500rpm
27.51 lb ft torque
Fiat-twin configuration engine
Pushrod and rocker valve operation
Reliable and efficient engine
Smooth engine operation
Top speed of 95mph
Excellent fuel consumption
Average 55-60mpg fuel consumption
4.8 gallon fuel tank
Five-speed gearbox
Shaft drive
Single cross-drilled disc brake at front
Powerful drum brake at rear
Cast-alloy wheels
Audible indicator warnings
Twin mirrors
Electric starter
Intercom device plug
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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
