Classic and Classy Motorcycles Ltd

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1970s Ducati 900SS (Super Sport) Valuation Report

Date: August 2025

Historical Overview

The bevel-drive Ducati 900SS is the poster child for 1970s Italian superbikes. The earliest 1975 “round-case” machines (blue/silver) trace their lineage to Ducati’s Imola racers and are the most coveted. From 1976–1980 the “square-case” 900SS arrived with revised casings and detail updates; still very collectible, more usable, and notably more affordable in the UK than the ultra-rare 1975 bikes. As ever, originality, matching numbers and correct spec make the difference between “nice” and “blue-chip”.

UK Valuation Summary (by condition and year range)

Condition	Round-case (1975, blue/silver)	Square-case (1976–1980)	Example External Source (non-link reference)
Project / Restoration Non-runner or incomplete; may lack scarce OEM parts (30mm/40mm carbs, Conti pipes, clocks); full mechanical & cosmetic rebuild needed	£35,000 – £55,000	£12,000 – £20,000	Anglia Car Auctions – classic bike lots; Vintagebike.co.uk classifieds archive
Roadworthy / Presentable Running and usable; older paint or mixed fasteners; generally correct but not concours	£55,000 – £80,000	£22,000 – £35,000	Manor Park Classics – motorcycle results; Collecting Cars – sold listings
Restored / Excellent High-quality restoration or very original survivor; matching numbers; correct finishes, instruments & Conti silencers	£85,000 – £120,000+	£35,000 – £55,000	Bonhams – motorcycle auctions; Iconic Auctioneers – sale archives; The Saleroom – multi-house results

Notes: UK-registered, documented round-case bikes in original blue/silver spec sit at the top end and can exceed the range when provenance is exceptional. Square-case values are strongest for unmolested, matching-numbers examples with correct carbs, Contis and bodywork. Modified or “bitsa” bikes trend 10–25% below midpoints.

Value Influencing Factors

• Authenticity & numbers: Matching engine/frame, factory records and period UK registration command major premiums.
• Correct parts: Original Conti silencers, correct carburettors (model-appropriate), instruments, clip-ons, rearsets and paint/decals materially raise prices.
• Mechanical health: Bevel drive setup, cam timing, top-end wear, carb condition, charging/ignition and gearbox shifts are key cost drivers.
• Restoration quality: Sympathetic, period-correct finishes outperform over-polished or non-OEM colourways.
• Provenance: Known history, period competition or magazine features, invoices and MOT trail add tangible value.
• Market timing: Spring/summer retail results are typically strongest; winter can present keener buys on projects.

Conclusion

The UK market draws a firm line between round- and square-case 900SS values. Round-case projects begin around £35–55k, usable riders achieve £55–80k, and collector-grade examples bring £85–120k+ with top money for fully documented, matching-numbers bikes. Square-case projects typically sit at £12–20k, roadworthy riders at £22–35k, and restored/original survivors at £35–55k. Buyers consistently pay for correctness, provenance and the right parts over fresh paint alone.

Note: Example source names are provided without outbound links. Exact sold listings may no longer be available online; prices were verified from UK sale records at the time of writing (including Bonhams, Iconic Auctioneers, H&H Classics, The Saleroom, Collecting Cars, Manor Park Classics, Anglia Car Auctions, Vintagebike.co.uk).

All Valuations