Bimota HB1 (1975)

The Bimota HB1 was a rare and exquisite motorcycle produced in 1975, with a limited production of only 12 units estimated. It was powered by a transverse four-cylinder, four-stroke, SOHC engine, featuring 2 valves per cylinder, resulting in a displacement of 736cc. Its bore x stroke measured 61 x 63mm, and its compression ratio was 9.2:1. The cooling system was a combination of air and oil-cooled. The motorcycle featured a battery induction coil ignition and an electric starter. It was capable of generating a maximum power output of 51.5 kW or 69 hp at 8000 rpm. The gearbox had five speeds, and the final drive type was a chain. The HB1 had a double open cradle frame structure constructed from chrome-molybdenum tubes. The front suspension consisted of telescopic forks, and the rear suspension was managed by a monoshock. The front and rear brakes had two discs and a single disc, respectively. Overall, the Bimota HB1 was an exceptional motorcycle that combined performance and design into a rare collector’s item.

Technical specifications:

Make Model: Bimota HB1

Year: 1975
Production: 12 units (est.)
Engine: Transverse four cylinder, four stroke, SOHC, 2 per cylinder
Capacity: 736 cc / 44.9 cub. in.
Bore x Stroke: 61 63 mm
Compression Ratio: 9.2:1
Cooling System: Air / oil cooled
Induction: 4x 28mm Keihin carbs
Ignition: Battery induction coil
Starting: Electric
Max Power: 51.5 kW / 69 hp @ 8000 rpm
Transmission: 5 Speed
Final Drive: Chain
Frame: Double open cradle structure, made of chrome-molybdenum tubes
Front Suspension: Telescopic forks
Rear Suspension: Monoshock
Front Brakes: 2x discs
Rear Brakes: Single disc