Highlights

Built by Rémy Monpezat in 2008 with a desmodromic valve system
Innovative engine that became the foundation for all belt-driven Ducati engines
Includes a spare disassembled engine for parts
Only 30 hours of track use at historical events

The Appeal

This Ducati 671 Project Single hails from a pivotal moment in Ducati's engineering history, serving as the developmental prototype that would eventually lead to the Pantah engine and all subsequent belt-driven Ducati powerplants. This motorcycle is a faithful reproduction made by Rémy Monpezat in 2008, embodying the innovative work of Taglioni with the help of Gianluigi Mengoli, Piero Cavazzi and Franco Farne from their original project of 1976. For the Ducati enthusiast or collector of rare motorcycles, this represents an opportunity to own a physical piece of the brand's engineering evolution - the missing link between Ducati's early singles and their modern desmodromic engines.

As the photographs attest, this bike is in excellent condition, with just 30 hours of track time during various historical events. The motorcycle comes complete with period-correct components, including Ceriani Grand Prix replica forks, Koni rear shock absorbers, and a drum brake with four cams and magnesium flanges. Adding to its appeal is the inclusion of a spare disassembled engine for parts, making this a complete package for the serious collector or enthusiast looking to preserve a crucial chapter in Ducati's engineering history.

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History and Paperwork

Track bike: no registration documents
Motorcycle engine number: M01100072
Comes with a spare used engine (number M0110015) disassembled for parts
Motorcycle has reportedly been ridden for 30 hours, generally on track during various historical events
The Ducati 671 project was developed by Gianluigi Mengoli, Piero Cavazzi, Taglioni and Franco Farne from April to December 1976 in Taglioni
This innovative engine was the study for the future Pantah engine and the father of all belt-driven Ducati engines
Videos of the motorcycle at Coupes Moto Légende 2022 and Salon Moto Légende 2023 available
Early 1970s project after the frozen 350GTL twin-cylinder study
Taglioni, Farné, and Mengoli created an innovative single-cylinder
Based on 860GT connecting rod and bore size of old 450 singles
Unique prototype built by Rémy Monpezat in 2008
Reportedly ready for track use

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The Condition

Maintained by its creator to an exemplary standard
Modified frame from the old single-cylinder models with a rectangular-section swingarm
Ceriani Grand Prix replica fork
Damaged front fender (replacement fender included)
Correct working condition

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The Mechanics

406cc single-cylinder engine
Features desmodromic head with oil feed to camshaft via rotating wick
Manual transmission with six gears
86mm bore, 70mm stroke
Desmodromic distribution system driven by a toothed belt in oil.
40mm intake valve, 38mm exhaust valve
Distribution diagram: 60/90/97/70 (intake opening/intake closing/exhaust opening/exhaust closing)
Mahle high compression piston (9:1 ratio)
Polished connecting rod from an 860 GT
Dell'Orto PHF 36 carburettor
Drum brake with four cams and magnesium flanges (reproduction)
Original rear brake
Period Koni rear shock absorbers
Swingarm pivot passes through engine cases
Experimental engine allowing the installation of a chain-driven distribution system (boss provided behind the timing cover)
Possible variation of the compression ratio (shim under the timing cover)
Possible installation of a kick-start system (provisioned boss on the clutch cover)
Design evolution from rounded to more angular forms
Lubrication system feeds camshaft via rotating wick
The bearings are spray-lubricated, the camshaft lobes are internally lubricated
Stainless steel exhaust silencer on the left
Swingarm pivot through engine cases concept retained, making the bike more compact
Originally designed for the centrifugal advance and ignition plate of older single-cylinder motorcycles, a Motoplat electronic ignition was fitted as standard. Currently, a Guyonnet electronic ignition is fitted
Pirelli was tasked with manufacturing a toothed belt that runs directly in oil. Currently, belt manufacturers have supplied a belt capable of operating under the most demanding conditions

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BEFORE YOU BUY

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