The Harley-Davidson RR250, also known as the Harley-Davidson 250RR, was a racing motorcycle, designed, developed and built by Harley-Davidson, conforming to the 250cc class regulations of the Grand Prix motorcycle racing world championship, between 1972 and 1977.[4][5][6][7]

Harley-Davidson RR250[1][2][3]
ManufacturerHarley-Davidson
Production19721977
Engine246 cc (15.0 cu in) two-stroke air-cooled (later water-cooled) parallel twin engine
Bore / stroke56 mm × 50 mm (2.2 in × 2.0 in)
Compression ratio12.0:1
Power49 hp (37 kW) @ 11,400 rpm (1972)
58 hp (43 kW) @ 12,000 rpm (1976)
Torque22.6 lb⋅ft (30.6 N⋅m)
Transmission6-speed, Chain
Suspension34mm Ceriani telescopic forks, twin Girling rear
BrakesDrum brakes: 230mm Ceriani 4-leading shoe (front), 230mm Ceriani twin leading shoe (rear)
Wheelbase1,250 mm (49 in)
Weight108–112 kg (238–247 lb) (dry)
Fuel capacity19 L (4.2 imp gal; 5.0 US gal)
Walter Villa's Harley-Davidson RR250
Harley-Davidson RR GP motorcycles

References

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  1. ^ "Harley Davidson RR250 Race Bike". May 2, 2013.
  2. ^ "Aermacchi 250 GP Racer | A two-stroke Harley GP machine! – MCNews". 23 May 2019.
  3. ^ "Titled in the US – 1975 Harley-Davidson RR250". Bike-urious. November 29, 2017.
  4. ^ "Harley Davidson RR-250 Road Racer".
  5. ^ "1975 Harley-Davidson RR 250". philsellers.com.
  6. ^ "Needs Some Work – 1974 Harley-Davidson RR250". Bike-urious. August 11, 2017.
  7. ^ "This two-stroke screamer is not the typical Harley". www.goodwood.com.