Английская Википедия:Ducati 24 Horas
Шаблон:Short description Шаблон:Use dmy dates Шаблон:Use British English Шаблон:Infobox motorcycle The Ducati 250 24 Horas (24 hours) is a Шаблон:Convert single cylinder bevel drive SOHC motorcycle produced by the Spanish manufacturer MotoTrans, who were licensed by Ducati to produce motorcycles under the Ducati brand name. The model was based on the 'narrow case' Ducati 250 and produced in three series from 1966 to 1974.Шаблон:Sfn It was named after Ducati's successes in the 24 hours of Montjuïc endurance races. Around 2,000 machines were produced in total.Шаблон:Sfn
Background
MotoTrans started manufacturing Ducati motorcycles under licence in Barcelona in 1958. They produced their first 250, the Deluxe, in 1963 which was based on the Diana. Amongst other changes, the bore and stroke were changed from the Italian bike's Шаблон:Convert to Шаблон:Convert.Шаблон:SfnШаблон:Sfn
Ducati had been competing in Barcelona's 24 hours of Montjuïc since 1957,Шаблон:Sfn winning in 1957, 1958 and 1960.Шаблон:Sfn Ducati withdrew from competing after the 1960 race and Mototrans took over the Ducati participation.Шаблон:Sfn They won in 1962Шаблон:Sfn and then in 1964 they won again, this time with a tuned and over bored 285 cc version of the 250.Шаблон:Sfn
Model history
First presented at the December 1965 Barcelona and the January 1966 Madrid Exhibitions, the 24 Horas went in production in 1966.Шаблон:Sfn The engine was tuned with a high lift camshaft and a 10:1 piston and was fitted with a Spanish-made Amal 376 Monobloc carburettor. The model was styled as a cafe racer was fitted with a fibreglass racing tank,Шаблон:Sfn clip-on handlebars, rearset footrest and a megaphone exhaust. A five speed gearbox was fitted.Шаблон:Sfn The bike was finished in red with a Black headlight.Шаблон:Sfn About 500 machines were manufactured in the first series.Шаблон:Sfn
In 1968 a second series was introduced with a racing hump on the saddle and larger brakes,Шаблон:Sfn the front being twin leading-shoe. A new headlight was fitted with separate instruments.Шаблон:Sfn
A third series was manufacturer in 1973/4Шаблон:Sfn that used an Amal Concentric carb.Шаблон:Sfn
UK
Few Italian-made Ducatis were imported to the UK and US during 1970-71 as the importers (Berliner in the US and Vic Camp in the UK) were in dispute with the factory over prices. During this period Spanish-built MotoTrans models were imported.Шаблон:Sfn
Vic Camp imported 150 24 Horas in 1971Шаблон:Sfn and another 80 in 1972.Шаблон:Sfn One of these suffered camshaft failure after Шаблон:Convert which the dealer refused to repair. The case was reported in Motorcycle News and the model became known as the 24 Horrors.Шаблон:SfnШаблон:Sfn The quality of the case hardening was poor on the Spanish-made camshafts.Шаблон:Sfn
Technical details
Engine and transmission
The single cylinder bevel drive OHC engine was of a vertically spilt unit constructionШаблон:Sfn and had alloy head and alloy barrel with austenitic liners.Шаблон:Sfn Hairspring valve springs were used to close the valves.Шаблон:Sfn Bore and stroke were Шаблон:Convert giving a displacement of Шаблон:Convert. Compression ratio was 8:1 and claimed power output was Шаблон:Convert @ 9,000 rpm.Шаблон:Sfn
Fuel was delivered by a 27 mm Spanish made Amal 375 Monobloc carburettor on early models and an Amal Concentric on later models. Wet sump lubrication was used and ignition was by battery and coil.Шаблон:Sfn
Primary drive was by helical gears to a multi-plate wet clutch to a 5 speed gearbox. Chain drive took power to the rear wheel.Шаблон:Sfn
Cycle parts
The single cradle frame used the engine as a stressed member,Шаблон:Sfn and was made of thicker tubing than the Italian models and heavily braced.Шаблон:Sfn Rear suspension was by swinging arm with twin Betor shock absorbers.Шаблон:Sfn At the front Шаблон:Convert Telesco telescopic forks were fitted. Brakes were drums, Шаблон:Convert diameter front and rear on the first series. These were changed to Шаблон:Convert when the second series was introduced,Шаблон:Sfn the front being a twin leading-shoe unit.Шаблон:Sfn
References
Bibliography
- Шаблон:Cite magazine
- Шаблон:Cite magazine
- Шаблон:Cite web
- Шаблон:Cite web
- Шаблон:Cite book
- Шаблон:Cite book
- Шаблон:Cite web
- Шаблон:Cite web
- Шаблон:Cite web
- Шаблон:Cite news
- Шаблон:Cite web
- Шаблон:Cite web
External links
