1981 BMW R 65

Specifications
- Category
- Classic
- Displacement
- 649.0 ccm (39.60 cubic inches)
- Displacement (cc)
- 649.00
- Engine details
- Two cylinder boxer, four-stroke
- Power
- 50.0 HP (36.5 kW) @ 7250 RPM
- Top speed
- 175.0 km/h (108.7 mph)
- Compression
- 9.2:1
- Bore × stroke
- 82.0 x 61.5 mm (3.2 x 2.4 inches)
- Valves/cyl
- 2.0
- Fuel control
- Overhead Valves (OHV)
- Cooling
- Air
- Gearbox
- 5-speed
- Transmission
- Shaft drive (cardan) (final drive)
- Front tyre
- 3.25-18
- Rear tyre
- 4.00-18
- Front brakes
- Single disc
- Rear brakes
- Expanding brake
- Wet weight
- 204.0 kg (449.7 pounds)
- Fuel capacity
- 22.00 litres (5.81 US gallons)
The 1981 BMW R 65
1981 BMW R 65 sits near the entry point of BMW's Airhead boxer lineup, the smaller-displacement twin built for riders who wanted the marque's engineering without stepping up to the bigger touring machines. This is a bike that rewards patient, all-day riding rather than aggressive acceleration; the boxer twin delivers its power in a broad, easy-going spread that makes shaft-driven cruising on secondary roads feel effortless. Owners describe it as mechanically honest — low-strung, low-maintenance by period standards, and stable at speed thanks to that low center of gravity from the horizontally opposed engine layout. It's a bike you ride, not baby.
The 1981 model carried over without significant mechanical changes from the prior year, buyers comparing it to a 1980 example should focus on mileage, service history, and condition rather than spec differences.
The typical buyer here is a practical classic-bike owner rather than a pure investor: someone who wants a usable, affordable entry into Airhead ownership, perhaps stepping down from a larger modern twin. Collector interest remains moderate, with the 1981 BMW R 65 appealing mainly to riders who value character and heritage over outright rarity.
Auction history
| Date | Listing | Price | Mileage | Source |
|---|---|---|---|---|
| Jul 25, 2025 | 860cc-Powered 1981 BMW R65 | $6,000 | — | Bring a Trailer |
| Jun 18, 2025 | 860cc-Powered 1981 BMW R65 | $5,600 | — | Bring a Trailer |
| Apr 11, 2025 | Modified 1981 BMW R65 | $5,100 | — | Bring a Trailer |
| May 12, 2022 | 1981 BMW R65 | $5,000 | — | Bring a Trailer |
