Honda CB 750 Four, history and restoration
The Honda CB 750 Four, unveiled in 1969, is considered the first true superbike. Inline four, front disc brake and a performance level that redrew the entire motorcycle industry overnight. At Piston Classics we restore this legend with the respect it deserves.
History
Presented in Tokyo in 1968 and launched in Europe in 1969, the Honda CB 750 Four immediately set a new standard. For the first time, a production motorcycle received an inline four, a front disc brake and a power level previously reserved for race circuits. Competitors took years to catch up.
The CB 750 Four was built from 1969 to 1978, across a series of model years K0 to K7 and the sportier F version. Each iteration brought small changes: improved carburation, different tank, different seat, different muffler. For collectors each model year is therefore its own specialism.
Today the CB 750 Four is an established collector bike. An early K0 in original condition is among the most sought-after pieces in the entire classic motorcycle landscape. Later K models also keep rising in value, especially when correctly restored with respect for the proper details per model year.
Model years
CB 750 K0 (1969 to 1970)
The very first version, recognisable by sandcast crankcases, small tank emblems and specific instruments. The most sought-after model year.
CB 750 K1 to K6 (1970 to 1976)
Continued development with larger tank, revised seat shape and updated muffler. More affordable entry point than a K0 and often easier in daily use.
CB 750 K7 and F (1977 to 1978)
Final model years with revised cylinder head, four-into-two exhaust on the K and four-into-one on the sportier F. Modern looking and therefore less typically seventies.
Technical data
- Years built
- 1969 to 1978
- Engine
- Inline four, four-stroke, air-cooled
- Displacement
- 736 cc
- Power
- 67 hp at 8000 rpm
- Gearbox
- 5 speed
- Weight
- around 218 kg dry
- Top speed
- around 200 km/h
- World first
- First production superbike with inline four and disc brake
Our approach
A CB 750 Four restoration is substantial work. The inline four requires expertise in carburettor synchronising, valve clearance setting on four cylinders and proper cylinder head gasket sealing. We do this entirely in-house, no shortcuts.
Paintwork follows the original Honda colour schemes per model year. We use original tank emblem colours and the correct fonts on the side panels. For a custom build everything remains discussable, but for collectors we advise respecting the original specifications because that maximally protects the bike's value.
Parts for the CB 750 Four come from our four-country network, supplemented by specialised suppliers in Japan and the United States for the rarest items (original exhausts, K0-specific parts, original sandcast crankcases).
Our restored CB 750 Four
No CB 750 Four currently in stock. See past builds below or get in touch for a custom restoration.
Frequently asked questions
What does a restored Honda CB 750 Four cost?+
A fully restored CB 750 Four respecting the original specs sits between 15000 and 30000 euro as a guide, depending on model year (K0 significantly higher), the originality of the donor bike and the chosen finish. Contact us for a tailored quote.
Which model year is most valuable?+
The K0 (1969 to 1970) with sandcast crankcases is by far the most desired model year, followed by the early K1. Later models (K2 to K7) are more affordable but also rising in value as well-restored examples become scarcer.
How do I check if engine and frame numbers match?+
On the CB 750 Four, frame and engine numbers should fall within a logical range for the correct model year. A matching-numbers example is significantly more valuable. We help with verification and can confirm production date through the Honda archive.
How long does a full CB 750 Four restoration take?+
Plan for six to twelve months from start, given the complexity of the inline four and sometimes long lead times for specific original parts. You receive regular updates and photos throughout.