Ducati 239 Mark 3
| Manufacturer | Suspension Front: telescopic forks | Rear: swinging arm |
|---|---|---|
| Brakes | Front (Mk 3): Twin-sided 180 mm (7.1 in) drum Front (Mk 3D): Single 280 mm (11 in) disc (Mk 3D) Rear: 160 mm (6.3 in) drum | |
| Tyres | Front: 300x19 Rear: 350x18 | |
| Wheelbase | 1,360 mm (54 in) | |
| Dimensions | L: 2,000 mm (79 in) W: 780 mm (31 in) | |
| Seat height | 735 mm (28.9 in) | |
| Weight | 128 kg (282 lb) (dry) | |
| Footnotes / references [1][2][3] | ||
The Ducati 239 Mark 3 is a 239 cc (14.6 cu in)
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.[5]
A desmodromic valve version, the Ducati 239 Mark 3D, was also available.[1][5]
Total production was around 400 machines; 250 Mark 3s and 150 Mark 3Ds.[6]
Technical details
Engine and transmission
The single cylinder bevel drive OHC engine was of
Fuel was delivered by a 30 mm
Primary drive was by helical gears to a
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.[2] At the front 35 mm (1.4 in)[10] Ceriani telescopic forks were fitted. The front brake was a twin-sided 180 mm (7.1 in) Grimeca drum on the Mark 3 and a single Brembo 280 mm (11 in) disc on the desmo.[9] At the rear a 160 mm (6.3 in) drum was fitted on both models.[2]
239 Mark 3D
An additional version of the 239 Mark 3 was offered, the 239 Mark 3D, also for the French market, that was fitted with a different head that used desmodromic valves.[11] (A system where the valves are positively closed by extra lobes on the cam and levers rather than by a more conventional springs).[12] The desmo was fitted with a disc brake on the front.[9] Around 150 demos were made.[6]
References
- ^ a b c d e f g Moto-Station.
- ^ a b c d e Falloon2016a, pp. 248–249, 265.
- ^ Walker 2003, pp. 16, 114, 126, 213–214.
- ^ Falloon 2016b, p. 121.
- ^ a b c d e Walker 2003, p. 16.
- ^ a b Falloon 2016a, p. 280.
- ^ Walker 2003, p. 44.
- ^ Desmo.net.
- ^ a b c Walker 2003, pp. 213–214.
- ^ Walker 2003, p. 114.
- ^ Falloon2016a, p. 265.
- ^ Cameron 2014.
Bibliography
- Cameron, Kevin (25 April 2014). "Why Does Ducati Stick With Desmodromic Valve Operation?". Cycle World.
- Falloon, Ian (July 2016). The Complete Book of Ducati Motorcycles: Every Model Since 1946. Minneapolis, MN: Motorbooks. ISBN 978-0-7603-5022-5.
- Falloon, Ian (18 March 2016). The Book of the Ducati Overhead Camshaft Singles. Poundbury, Dorchester: Veloce Publishing Ltd. ISBN 978-1-84584-566-7.
- 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.
- "Technik Info". Desmo.net (in German). Retrieved 3 October 2021.