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1960s BSA Spitfire 650 (Mk II–IV) Valuation Report

Date: August 2025

Historical Overview

The BSA Spitfire 650 was introduced in 1966 as a high-performance unit twin, inheriting the BSA Lightning frame but with higher compression pistons, twin Amal GP carburettors, alloy rims, and improved brakes. The Mark II launched in 1966, succeeded by the Mk III (with Amal Concentrics for better starting) and the rare Mk IV in 1968 with twin-leading-shoe brakes and improved ignition. It was the fastest standard BSA of its era.

UK Valuation Summary (by condition)

Condition	Estimated Value (GBP)	Example External Source (non-link reference)
Project / Restoration Non-running or incomplete; mechanical or cosmetic recommissioning required.	£2,800 – £4,000	Mecum Historic data – 1966 BSA Spitfire non-runner bid ~$3,700 (~£3,000)
Roadworthy / Presentable Running, tidy; may show minor wear or period wear but mechanically sound.	£5,500 – £7,000	Iconic Auctioneers – 1966 Mk II sold £6,187
Restored / Excellent Very original or restored; alloy wheels, GP reeds or Concentrics, polished trim.	£7,500 – £10,000	Hagerty valuation for Mk IV in excellent condition ~$7,900 (~£6,500)

Value Influencing Factors

• Model & Carburettors: Mk II with Amal GP is rare and appealing to purists; Mk III/IV are smoother daily riders.
• Condition & period parts: Original wheels, trim, exhaust, and correct paint match numbers are prized.
• Mileage & service history: Fully carb-tuned small twins with MOT or workshop receipts see top results.
• Rarity & desirability: Spitfire Mk IV production was limited; well restored examples attract premium.
• Auction venue: Stafford or Iconic Auction motors bring better prices than classifieds.

Conclusion

In the UK, presentable Mk II–IV BSA Spitfires usually reach £5.5k–£7k, with very clean or restored examples realizing £7.5k–£10k. Project bikes fall into the £2.8k–£4k range. Condition, matching parts, and documentation are key to achieving stronger results.

Source attribution (non-link references): Iconic Auctioneers – 1966 Mk II sold £6,187; Hagerty valuation – Mk IV excellent ~$7,900; Mecum Historic – non-runner bid ~$3,700.

All Valuations