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The 1975 BMW R90/6 and 1985 BMW K75 represent two chapters in BMW's storied history.
The 1975 BMW R90/6 from Germany was powered by a 898cc OHV flat-twin producing 60hp at 6500rpm. Weighing 200.0kg (441 lbs) and with a seat height of 810mm, it was aimed at touring riders.
The 1985 BMW K75 by contrast offered 740cc of DOHC inline-3 power, delivering 75hp at 8500rpm. Tipping the scales at 210.0kg (463 lbs) with a top speed of 200km/h (124 mph), it offered a distinct riding experience. 1970s bikes from the Japanese superbike revolution are increasingly sought after. Clean, original examples have seen significant value appreciation.
The 1975 BMW R90/6 from Germany was powered by a 898cc OHV flat-twin producing 60hp at 6500rpm. Weighing 200.0kg (441 lbs) and with a seat height of 810mm, it was aimed at touring riders.
The 1985 BMW K75 by contrast offered 740cc of DOHC inline-3 power, delivering 75hp at 8500rpm. Tipping the scales at 210.0kg (463 lbs) with a top speed of 200km/h (124 mph), it offered a distinct riding experience. 1970s bikes from the Japanese superbike revolution are increasingly sought after. Clean, original examples have seen significant value appreciation.
Specifications Comparison
| 1975 BMW R90/6 | 1985 BMW K75 | |
|---|---|---|
| Displacement | 898 cc | 740 cc |
| Power | 60 hp | 75 hp |
| Torque | 62.0 Nm | 66.0 Nm |
| Cylinders | 2 | 3 |
| Top Speed | 190 km/h | 200 km/h |
| Quarter Mile | — | — |
| Dry Weight | 200.0 kg | 210.0 kg |
| Wet Weight | 215.0 kg | 228.0 kg |
| Seat Height | 810 mm | 810 mm |
| Wheelbase | 1465 mm | 1496 mm |
| Fuel Capacity | 17.0 L | 21.0 L |
| Gears | 5 -speed | 5 -speed |
The Verdict
Comparing these two BMW machines reveals the brand's evolution. The 1975 BMW R90/6 laid the groundwork with 60hp, while the later 1985 BMW K75 pushed output to 75hp. From a collector's perspective, the 1975 BMW R90/6 holds the edge with a 6/10 rating. Either way, both are worthy additions to any BMW collection.
About the 1975 BMW R90/6
The 1975 1975 BMW R90/6 is a 898cc twin-cylinder touring motorcycle that became one of BMW's most memorable motorcycles of the 1970s.
Full 1975 BMW R90/6 Profile →About the 1985 BMW K75
Born in 1985, the 1985 BMW K75 is a 740cc triple-cylinder standard motorcycle producing 75hp from BMW.
Full 1985 BMW K75 Profile →