Ducati 239 Mark 3: Difference between revisions
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===Bibliography=== |
===Bibliography=== |
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* {{cite book |last1=Walker |first1=Mick |title=Ducati Singles Restoration |date=2003 |publisher=MotorBooks International |isbn=978-1-61060-919-7 |url=https://books.google.com/books?id=JaXQtjcbmC4C&q=ducati+350+mark+3&pg=PA16 |language=en}} |
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* {{cite web |title=Ducati mono : Grazie Signore Taglioni ! |url=https://moto-station.com/moto-revue/essai/ducati-mono-grazie-signore-taglioni |website=Moto-Station |trans-title=Ducati mono: Thank you Mr. Taglioni! |access-date=3 October 2021 |ref={{harvid|Moto-Station}} |language=fr-FR}} |
* {{cite web |title=Ducati mono : Grazie Signore Taglioni ! |url=https://moto-station.com/moto-revue/essai/ducati-mono-grazie-signore-taglioni |website=Moto-Station |trans-title=Ducati mono: Thank you Mr. Taglioni! |access-date=3 October 2021 |ref={{harvid|Moto-Station}} |language=fr-FR}} |
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Revision as of 15:26, 3 October 2021
| Manufacturer | Ducati |
|---|---|
| Production | 1974 |
| Class | Standard |
| Engine | Air-cooled bevel drive SOHC single cylinder four stroke |
| Bore / stroke | 72.5 mm × 57.8 mm (2.85 in × 2.28 in) |
| Power | 22 bhp (16 kW) @ 7,500 rpm |
| Transmission | Multiplate wet clutch, 5 speed |
| Frame type | Single cradle |
| Suspension | Front: telescopic forks Rear: swinging arm |
| Brakes | Front: Single disc Rear: 160 mm (6.3 in) Drum |
| Footnotes / references [1] | |
The Ducati 239 Mark 3 is a 340 cc (21 cu in) single cylinder bevel drive SOHC motorcycle produced by the Italian manufacturer Ducati in limited quantities for the French market in 1974. The French Government has announced that they were to increase VAT on motorcycles of 240 cc and above in 1975. Ducati responded by producing the 239 to take advantage of the lower 20% VAT rate on sub-240 machines.[1] To compensate for the reduced capacity, the engine was tuned to produce more power with a different camshaft,[1] slipper piston, 30 mm carburettor and a different exhaust using a Lafranconi silencer.
The factory ceased production of ohc singles in 1974. The remaining stocks were purchased by the then British importer Coburn & Hughes, including some 239s, who continued to sell them until early 1976.
A desmodromic valve version, the Ducati 239 Mark 3D, was also available.
Technical details
Engine and transmission
The single cylinder bevel drive OHC engine was of unit construction and had alloy head and alloy barrels with cast iron liners and was based on the 'wide case' engines used in the racers. bore and stroke were 72.5 mm × 57.8 mm (2.85 in × 2.28 in) giving a displacement of 239 cc (14.6 cu in).[1] Coil valve springs were fitted which was a departure from Ducati's normal practice of fitting hairsprings on the OHC singles. Claimed power output was 22 bhp (16 kW) @ 7,500 rpm.[1]
Fuel was delivered by a 30 mm Dell'Orto pumper carburettor, as used on the 750 GT.[1]
Primary drive was by helical gears to a multi-plate wet clutch and 5 speed gearbox. Chain drive took power to the rear wheel.
Cycle parts
The single cradle frame was the same as the item used on the 250 and used the engine as a stressed member. Rear suspension was by swinging arm with twin 3-way adjustable Marzocchi shock absorbers. At the front Ceriani telescopic forks were fitted. The front brake was a single Brembo disc[1] and the rear a 160 mm (6.3 in) drum.
References
Bibliography
- Walker, Mick (2003). Ducati Singles Restoration. MotorBooks International. ISBN 978-1-61060-919-7.
- "Ducati mono : Grazie Signore Taglioni !" [Ducati mono: Thank you Mr. Taglioni!]. Moto-Station (in French). Retrieved 3 October 2021.