Ducati Diana

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Ducati Diana
Manufacturer
Suspension
Front: telescopic forks
Rear: swinging arm
BrakesDrum front & rear
TyresFront: 275x18
Rear: 300x18
Wheelbase1,330 mm (52 in)
DimensionsL: 1,980 mm (78 in)
W: 680 mm (27 in)
H: 930 mm (37 in)
Seat height750 mm (30 in)
Weight120 kg (260 lb) (dry)
Footnotes / references
[1][2][3]

The Ducati Diana, known as the Ducati Daytona in the UK, is a 249 cc (15.2 cu in)

SOHC motorcycle produced by the Italian manufacturer Ducati from 1961 to 1964. It was the sports version of Ducati's first 250 cc road bike. It was replaced in 1962 by the higher performance Ducati Diana Mark 3 in the US[4] and by the Ducati Mach 1 in Europe in September 1964.[5]

History

Following the success in racing of the 250 F3, and using an engine based on that of the racer, Ducati introduced its first 250 cc road bikes at the April 1961 Milan Fair. The bikes were offered in two versions, the touring Monza and sports Diana.[6] The Diana was styled by Renzo Neri and had rear-set controls, clip-on handlebars, a steel 15 L (3.3 imp gal; 4.0 US gal) petrol tank and sporting mudguards. The bike had a blue frame and was finished in blue and silver.[7]

A tuning kit was available for the Diana and included a high compression 9:1

carburettor and megaphone silencer.[4][1] Motorcycle Mechanics magazine road tested a Diana with the tuning kit installed and recorded a top speed of over 100 mph (160 km/h).[5]

Technical details

Engine and transmission

The single cylinder bevel drive OHC engine was of

big end and hairspring valve springs were used to close the valves.[8] Bore and stroke were 74 mm × 57.8 mm (2.91 in × 2.28 in) giving a displacement of 248 cc (15.1 cu in). Compression ratio was 8:1.[1] Claimed power output was 24 bhp (18 kW), giving the machine a top speed of 85 mph (137 km/h).[3][9]

Fuel was delivered by a 24 mm

carburettor.[10] Wet sump lubrication was used and ignition was by battery and coil with the points under a cover on the right hand side of the engine.[11]

Primary drive was by helical gears to a

gearbox. Chain drive took power to the rear wheel.[1]

Cycle parts

The single cradle frame used the engine as a stressed member.[12] Rear suspension was by swinging arm with twin 3-way adjustable Marzocchi shock absorbers.[1] At the front 31.5 mm (1.24 in) telescopic forks were fitted.[13] Brakes were drums, the front being 180 mm (7.1 in) diameter and the rear 160 mm (6.3 in).[1]

References

  1. ^ a b c d e f Falloon 2016a, p. 104.
  2. ^ Walker 2003, p. 212.
  3. ^ a b Garlitos 2012.
  4. ^ a b Ducati Classics.
  5. ^ a b Haylock 1978, p. 21.
  6. ^ Yesterdays.
  7. ^ Falloon 2016a, pp. 102–104.
  8. ^ Falloon 2016a, p. 100.
  9. ^ Walker 2002, p. 36.
  10. ^ Falloon 2016a, p. 101.
  11. ^ Walker 2002, p. 213.
  12. ^ Walker 2003, p. 105.
  13. ^ Walker 2003, p. 114.

Bibliography

  • Falloon, Ian (18 March 2016). The Book of the Ducati Overhead Camshaft Singles. Poundbury, Dorchester: Veloce Publishing Ltd.
    ISBN 978-1-84584-566-7
    .
  • Garlitos, Kirby (11 May 2012). "1966 Ducati 250 Diana". Top Speed. Retrieved 8 October 2021.
  • Haylock, Bill (1978). "Ducati Singles" (PDF).
    OCLC 1250189614
    – via www.hogervorst.tech.
  • Walker, Mick (2002). Illustrated Ducati Buyer's Guide. MotorBooks International.
    ISBN 978-1-61059-045-7
    .
  • Walker, Mick (2003). Ducati Singles Restoration. MotorBooks International.
    ISBN 978-1-61060-919-7
    .
  • "175, 200 and 250 (NC) Singles". Ducati Classics. Retrieved 6 October 2021.
  • "Ducati 1967 Monza 250cc 1 cyl ohc 2811". Yesterdays. Retrieved 6 October 2021.
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