1985 BMW K 100 RS

Specifications
- Category
- Sport touring
- Displacement
- 987.0 ccm (60.23 cubic inches)
- Displacement (cc)
- 987.00
- Engine details
- In-line four, four-stroke
- Power
- 90.0 HP (65.7 kW) @ 8000 RPM
- Top speed
- 222.0 km/h (137.9 mph)
- Compression
- 10.2:1
- Bore × stroke
- 67.0 x 70.0 mm (2.6 x 2.8 inches)
- Valves/cyl
- 2.0
- Fuel control
- Double Overhead Cams/Twin Cam (DOHC)
- Cooling
- Liquid
- Gearbox
- 5-speed
- Transmission
- Shaft drive (cardan) (final drive)
- Front tyre
- 100/90-18
- Rear tyre
- 130/90-17
- Front brakes
- Dual disc
- Rear brakes
- Single disc
- Wet weight
- 260.0 kg (573.2 pounds)
- Fuel capacity
- 22.00 litres (5.81 US gallons)
The 1985 BMW K 100 RS
1985 BMW K 100 RS sits near the top of BMW's transition-era lineup, the flagship sport-tourer built to prove the new inline-four could replace the airhead boxer without losing the brand's identity. This is a bike built for covering serious distance at speed, not for weekend posturing. The fairing and riding position favor autobahn cruising over canyon carving, and the shaft drive means you're not babysitting a chain on a 500-mile day. Owners describe it as mechanically dense and reassuring rather than exciting in a visceral sense, the kind of machine that rewards a rider who values consistency over drama.
The 1985 model carried over without significant mechanical changes from the prior year — buyers comparing it to a 1984 example should focus on mileage, service history, and condition rather than spec differences.
Typical buyers are experienced riders in their 40s and up, often former airhead owners or long-distance touring enthusiasts drawn to the K-series' reputation for durability. Collector interest remains moderate rather than speculative, appealing more to riders who want a usable classic than investors chasing appreciation.
Auction history
| Date | Listing | Price | Mileage | Source |
|---|---|---|---|---|
| Jul 7, 2026 | 1985 BMW K100RS | $3,800 | — | Bring a Trailer |
| Dec 10, 2025 | Modified 1985 BMW K100RS | $9,082 | — | Bring a Trailer |
| Sep 14, 2025 | 1985 BMW K100RS Cafe Racer | $7,500 | — | Bring a Trailer |
| Jun 10, 2025 | 1985 BMW K100RS Cafe Racer | $6,100 | — | Bring a Trailer |
| Sep 7, 2023 | 1985 BMW K100RS | $3,600 | — | Bring a Trailer |

