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1970s Honda CB750 Valuation Report

Date: August 2025

Historical Overview

Launched in the UK in 1969, the CB750’s 736 cc SOHC four, electric start and front disc brake set the superbike template. Early K0 “sandcast” (1969–70) and very early die-cast K0/K1 machines carry a premium; later K2–K6 (1972–76) and F1/F2 Super Sport (1975–78) are more attainable but still sought after as usable classics.

UK Valuation Summary (by condition and variant)

Condition	Early K0–K1 (1969–71, incl. sandcast)	K2–K6 & F1/F2 (1972–78)	Example External Source (non-link reference)
Project / Restoration Non-runner or incomplete; needs mechanical recommissioning and cosmetics. K0/K1 projects still command a premium due to rarity.	£5,000 – £9,000	£1,800 – £3,000	Bonhams – CB750 K6 project (sold); The Saleroom – CB750 results; eBay UK completed
Roadworthy / Presentable Running, usable, largely stock; older paint or minor deviations acceptable. Early K0/K1 (sandcast/early die-cast) sit substantially higher.	£11,500 – £19,125	£3,450 – £4,500	Bonhams – 1970 CB750 K0 £11,500 (Stafford); Iconic Auctioneers – 1970 K0 £19,125; Iconic Auctioneers – 1972 K2 £3,450; H&H Classics – 1974 K4 £4,025; Car & Classic Auctions – 1978 F2 £3,900
Restored / Excellent High-quality restoration or very original survivor; matching numbers; correct exhaust, airbox and finishes. Early K0/K1 peak highest.	£17,000 – £20,000	£5,000 – £7,000	Iconic Auctioneers – K0 strong results; H&H Classics – 1975 K6 £5,850; Car & Classic/Manor Park – late-’70s F-series strong survivors

Notes: Ranges are built from recent UK sold prices. Where international results were considered for context, figures are sensibly converted to GBP and cross-checked against UK sales. Extremely rare pre-production/prototype CB750s are excluded as outliers.

Value Influencing Factors

• Variant & year: K0 “sandcast” and early K0/K1 command the highest prices; later K-series and F1/F2 trail but remain desirable.
• Originality: Matching numbers, OEM 4-into-4 exhausts, correct airbox and finishes lift values markedly.
• Condition & completeness: Evidence of engine work (cam-chain, top-end, carbs) and tidy cosmetics support stronger results.
• Documentation: V5C, history file, import paperwork and mileage corroboration reduce buyer risk and improve hammer prices.
• Market timing & venue: Spring/early summer UK auctions and well-photographed online listings typically perform best.
• Modifications: Café conversions, non-OEM pipes or missing airboxes usually cap values unless original parts are included.

Conclusion

In the UK, early K0–K1 CB750s trade well above later models: running examples typically realise £11.5k–£19.1k, with the best restored/original bikes around £17k–£20k. Later K2–K6 & F-series offer more accessible ownership: riders commonly achieve £3.45k–£4.5k, with strong restorations around £5k–£7k. Correctness, matching numbers and complete OEM parts push any example to the top of its band.

Source attribution (non-link references): Bonhams (Stafford & online motorcycle sales), Iconic Auctioneers (NEC/ExCeL sales), H&H Classics (National Motorcycle Museum & online), The Saleroom (multi-house results), Car & Classic Auctions, Manor Park Classics, Anglia Car Auctions, eBay UK completed listings.

All Valuations