04 June. Thursday 2026
BMW R 45 (reduced Effect) - 1981 Specifications and Reviews
The 1981 BMW R 45 is a lightweight sport-touring boxer ideal for riders seeking accessible performance and reliability. Known for its manageable 27 horsepower, smooth air-cooled twin, and classic shaft-drive handling, it excels as an entry-level adventure machine offering genuine BMW engineering in a user-friendly package.
-10352.webp "BMW R 45 (reduced Effect) 1981 Image: 1")
-thumb-10352.webp "BMW R 45 (reduced Effect) 1981 Thumb: 1")
General information | |
| Category | Sport touring |
| Year | 1981 |
| Model | BMW R 45 (reduced effect) |
| | |
Engine and Transmission Specifications | |
| Transmission typefinal drive | Shaft drive (cardan) |
| Gearbox | 5-speed |
| Cooling system | Air |
| Fuel control | OHV |
| Valves per cylinder | 2 |
| Bore x stroke | 70.0 x 61.5 mm (2.8 x 2.4 inches) |
| Compression | 8.2:1 |
| Power | 27.00 |
| Stroke | 4 |
| Engine type | Two cylinder boxer |
| Capacity: | 473.00 ccm (28.86 cubic inches) |
Physical measures and capacities | |
| Weight incl. oil, gas, etc | 206.0 kg (454.2 pounds) |
| | |
BMW R 45 (reduced Effect) dimensions and frame | |
| Rear brakes | Expanding brake |
| Front brakes | Single disc |
| Rear tyre dimensions | 4.00-18 |
| Front tyre dimensions | 3.25-18 |
Speed and acceleration | |
| Top speed | 141.0 km/h (87.6 mph) |
Other specs | |
| Fuel capacity | 22.00 litres (5.81 gallons) |
Rider Reviews
Add a Comment
Related Motorcycle Specifications
More BMW Motorcycles
- Motorcycles in database: 36900
- Technical specifications: 1251993
- Images of motorcycles: 63755
- Videos: 339
- Manufacturers: 502
Please Login or Register if you would like to leave a comment.