Английская Википедия:Ducati 450 Scrambler
Шаблон:Short description Шаблон:Use dmy dates Шаблон:Use British English Шаблон:Infobox motorcycle The Ducati 450 Scrambler, also known in the US as the Ducati JupiterШаблон:Sfn and in Europe as the Ducati 450 SCRШаблон:Sfn is an on/off-road Шаблон:Convert single cylinder bevel drive SOHC motorcycle produced by the Italian manufacturer Ducati from 1969 to 1974. Total production was around 11,000 machines.Шаблон:Sfn
The model was also produced under licence in Spain by MotoTrans.Шаблон:Sfn
History
In 1968 the global market for dirt bikes was large.Шаблон:Sfn Ducati was already producing 250 and 350 Scramblers but the American importers, Berliner Motor Corporation requested a larger-engined version to compete against the BSA 441 Victor.Шаблон:Sfn The 450 Scrambler was introduced in 1969, and was the first model to use the 436 cc engine,Шаблон:Sfn which was the largest displacement possible that the OHC engine could be stretched to.Шаблон:Sfn The frame, the design of which used input from the racing department,Шаблон:Sfn was a strengthened version of that used on the smaller scramblers with gussets along the top tube.Шаблон:Sfn
The 450 was successfully used in flat track, enduro and scrambles racing.Шаблон:Sfn
In 1973 the model gained electronic ignition, a double-sided front brakeШаблон:Sfn and the lights and instruments used on the Mark 3.Шаблон:Sfn
The factory ceased production of OHC singles in 1974. The remaining stocks were purchased by the then British importer Coburn & Hughes, who continued to sell them until early 1976. Amongst these bikes were some 450 Scramblers which were marketed as Mark 4, a reference to the Mark 3 roadsters.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 barrels with austenitic liners.Шаблон:Sfn Ball bearings were used in the main bearings and roller bearings for the big end.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 9.3:1 and claimed power output was Шаблон:Convert @ 7,000 rpm.Шаблон:Citation needed
Fuel was supplied by a 29mm square-slide Dell'Orto VHB carburettor. Wet sump lubrication was used and ignition was by battery and coil until 1973 when Electronic ignition was fitted.Шаблон:Sfn
Primary drive was by helical gears to a multi-plate wet clutchШаблон:Sfn to a 5 speed gearbox. Chain drive took power to the rear wheel,Шаблон:Sfn and was wider than the chain used on other models.Шаблон:Sfn
Cycle parts
The single cradle frame used the engine as a stressed member,Шаблон:Sfn and had strengthening gussets on the top tube.Шаблон:Sfn Rear suspension was by swinging arm with twin 3-way adjustable Marzocchi shock absorbers. At the front Шаблон:Convert Marzocchi telescopic forks were fitted. Brakes were drums, the front being Шаблон:Convert diameter front and Шаблон:Convert rear.Шаблон:Sfn A double-sided front brake was fitted from 1973.Шаблон:Sfn Wire wheels with alloy rimsШаблон:Sfn were fitted with 350x19 front and 400x18 rear tyres.Шаблон:Citation needed
References
Bibliography
- Шаблон:Cite web
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- Шаблон:Cite web
- Шаблон:Cite magazine
- Шаблон:Cite web
- Шаблон:Cite web
External links
