What is the engine displacement of the 1975 BMW 90-6?

The 1975 BMW 90-6 has an engine displacement of 898.0 ccm (54.80 cubic inches).

What is the top speed of the 1975 BMW 90-6?

The 1975 BMW 90-6 has a top speed of 184.0 km/h (114.3 mph).

1975 BMW 90-6 Price, Specs, Review

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Review

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The 1975 BMW R90/6 is a classic airhead motorcycle representing a significant era in BMW's history. Its 898cc engine delivers a smooth and torquey power delivery, characteristic of the air-cooled boxer twins of that time. While its top speed is 184 km/h, the emphasis is on the riding experience and the distinctive feel of the engine. The 5-speed gearbox provides smooth and reliable shifting. The R90/6 offers a comfortable, upright riding position, suitable for both short trips and longer rides. The 18-liter fuel tank provides a decent range for touring. The single front disc brake was considered advanced for its time and offers adequate stopping power. This bike is aimed at riders who appreciate classic motorcycles and the unique riding experience they provide. It's a great choice for those who enjoy the simplicity and character of vintage machines and are willing to maintain them. The BMW R90/6 is a piece of motorcycling history, offering a blend of style, performance, and nostalgia.

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Pros (Advantages)

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✅ Why buy this bike?

• Legendary BMW 'Airhead' boxer engine offers smooth power delivery and excellent reliability for its era. • Shaft drive eliminates chain maintenance, providing a clean, quiet, and durable final drive system. • Comfortable riding position and plush suspension make it ideal for long-distance touring and highway cruising. • Timeless classic styling and high build quality ensure it retains significant value and attracts collectors. • Relatively easy to maintain for a classic, with good parts availability and a strong owner community. • Distinctive exhaust note from the boxer engine is a signature sound, enhancing the riding experience.

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Cons (Disadvantages)

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⚠️ Things to consider

• Drum rear brake offers limited stopping power compared to modern disc setups, requiring anticipation. • Original suspension, while comfortable, can feel soft and vague when pushed aggressively through corners. • Carburetor synchronization and tuning can be finicky for optimal performance and fuel efficiency. • Compared to modern bikes, acceleration and top speed are modest, reflecting 1970s performance standards. • Weight of the bike can be noticeable at low speeds or when maneuvering, especially for smaller riders.

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License Class (EU)

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Rule of thumb: under 125cc / 15HP → A1, under 47HP → A2, above → A.

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Fuel Economy & Running Costs

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Estimated average for 898cc class: 35-50 mpg (5.0-7.0 L/100km)

⛽ Tank: 18.00 litres (4.76 US gallons)

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Insurance Class

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