1975 BMW R 90-6

Specifications
- Category
- Sport touring
- Displacement
- 898.0 ccm (54.80 cubic inches)
- Displacement (cc)
- 898.00
- Engine details
- Two cylinder boxer, four-stroke
- Power
- 60.0 HP (43.8 kW) @ 6500 RPM
- Top speed
- 184.0 km/h (114.3 mph)
- Compression
- 9.0:1
- Bore × stroke
- 90.0 x 70.6 mm (3.5 x 2.8 inches)
- Valves/cyl
- 2.0
- Fuel control
- Overhead Valves (OHV)
- Cooling
- Air
- Gearbox
- 5-speed
- Transmission
- Shaft drive (cardan) (final drive)
- Front tyre
- 3.25-19
- Rear tyre
- 4.00-18
- Front brakes
- Single disc
- Rear brakes
- Expanding brake
- Wet weight
- 227.0 kg (500.4 pounds)
- Fuel capacity
- 18.00 litres (4.76 US gallons)
The 1975 BMW R 90-6
1975 BMW R 90-6 sits in the middle of the R90 range, a step down from the fully-faired S but built on the same airhead platform that redefined what a touring twin could do on a long day's ride. This is a bike meant for covering real distance, not showing off in a parking lot. The boxer engine sits low and wide, giving it a planted, unshakeable feel through fast sweepers, and that shaft drive means no chain maintenance breaking up your trip through the Alps. Riders describe the power delivery as unhurried but honest, the kind of machine that rewards smooth inputs rather than aggression. The 1975 model carried over without significant mechanical changes from the prior year — buyers comparing it to a 1974 example should focus on mileage, service history, and condition rather than spec differences. Today's buyer is usually someone who rode airheads decades ago and wants one back, or a mechanically inclined enthusiast drawn to a machine that's straightforward to maintain. Collector interest remains moderate, with clean, documented examples of the 1975 BMW R 90-6 holding steady value rather than spiking.
Auction history
| Date | Listing | Price | Mileage | Source |
|---|---|---|---|---|
| Jun 9, 2026 | 1976 BMW R90/6 4-Speed | $4,250 | — | Bring a Trailer |
| Oct 8, 2025 | 1975 BMW R90/6 | $2,975 | — | Bring a Trailer |
| Aug 24, 2025 | 1975 BMW R90/6 | $7,500 | — | Bring a Trailer |
| Aug 17, 2025 | 1976 BMW R90/6 | $5,100 | — | Bring a Trailer |
| May 28, 2025 | 1975 BMW R90/6 | $5,107 | — | Bring a Trailer |
| May 15, 2025 | 1976 BMW R90/6 | $3,333 | — | Bring a Trailer |
| Apr 3, 2025 | 1975 BMW R90/6 | $4,000 | — | Bring a Trailer |
| Feb 5, 2025 | 1976 BMW R90/6 | $4,400 | — | Bring a Trailer |
| Aug 15, 2024 | 1976 BMW R90/6 | $5,000 | — | Bring a Trailer |
| Aug 11, 2024 | 1976 BMW R90/6 | $8,850 | — | Bring a Trailer |
| Jul 26, 2024 | 1976 BMW R90/6 | $18,750 | — | Bring a Trailer |
| Jun 13, 2024 | 1976 BMW R90/6 | $7,600 | — | Bring a Trailer |
| May 24, 2024 | 1975 BMW R90/6 | $8,800 | — | Bring a Trailer |
| May 6, 2024 | 1975 BMW R90/6 | $9,000 | — | Bring a Trailer |
| Jan 7, 2024 | 1975 BMW R90/6 | $4,750 | — | Bring a Trailer |
| Dec 28, 2023 | Modified 1975 BMW R90/6 | $7,000 | — | Bring a Trailer |
| Sep 8, 2023 | Original-Owner 1976 BMW R90/6 | $6,200 | — | Bring a Trailer |
| Jun 25, 2023 | 42-Years-Owned 1976 BMW R90/6 | $4,300 | — | Bring a Trailer |
| Jun 16, 2023 | 1975 BMW R90/6 | $4,950 | — | Bring a Trailer |
| Jun 9, 2023 | 1976 BMW R90/6 | $10,500 | — | Bring a Trailer |
| May 23, 2023 | 1976 BMW R90/6 | $3,250 | — | Bring a Trailer |
| Mar 23, 2023 | Modified 1976 BMW R90/6 | $4,950 | — | Bring a Trailer |
| Feb 2, 2023 | 1976 BMW R90/6 | $6,800 | — | Bring a Trailer |
| Aug 3, 2022 | 1975 BMW R90/6 | $7,600 | — | Bring a Trailer |
| Jul 26, 2022 | 1976 BMW R90/6 | $4,500 | — | Bring a Trailer |
| Jul 19, 2022 | 1976 BMW R90/6 | $5,900 | — | Bring a Trailer |
| Jun 19, 2022 | 1976 BMW R90/6 w/Watsonian Sidecar | $7,600 | — | Bring a Trailer |
| Jun 15, 2022 | 1976 BMW R90/6 Project | $3,651 | — | Bring a Trailer |
| Jun 12, 2022 | 1976 BMW R90/6 | $7,000 | — | Bring a Trailer |
| Mar 31, 2022 | 1975 BMW R90/6 | $9,331 | — | Bring a Trailer |
| Dec 3, 2021 | 1976 BMW R90/6 | $7,500 | — | Bring a Trailer |
| Sep 21, 2021 | 1976 BMW R90/6 | $7,250 | — | Bring a Trailer |
| Aug 6, 2021 | 1976 BMW R90/6 | $3,475 | — | Bring a Trailer |
| Jul 30, 2021 | 1976 BMW R90/6 | $11,500 | — | Bring a Trailer |
| Jun 5, 2021 | 1975 BMW R90/6 | $18,906 | — | Bring a Trailer |
| Sep 11, 2020 | Original-Owner 1976 BMW R90/6 | $5,000 | — | Bring a Trailer |
| Jul 31, 2020 | 1975 BMW R90/6 | $9,600 | — | Bring a Trailer |
| Feb 20, 2020 | Modified 1975 BMW R90/6 | $12,500 | — | Bring a Trailer |
| Dec 30, 2019 | 1976 BMW R90/6 | $4,000 | — | Bring a Trailer |
| Dec 11, 2019 | 1976 BMW R90/6 | $4,900 | — | Bring a Trailer |
| Sep 20, 2019 | 1975 BMW R90/6 | $9,300 | — | Bring a Trailer |
| Apr 3, 2019 | 1976 BMW R90/6 | $8,500 | — | Bring a Trailer |

