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]
 | |
| Manufacturer | Harley-Davidson |
|---|---|
| Production | 1972–1977 |
| Engine | 246 cc (15.0 cu in) two-stroke air-cooled (later water-cooled) parallel twin engine |
| Bore / stroke | 56 mm × 50 mm (2.2 in × 2.0 in) |
| Compression ratio | 12.0:1 |
| Power | 49 hp (37 kW) @ 11,400 rpm (1972) 58 hp (43 kW) @ 12,000 rpm (1976) |
| Torque | 22.6 lb⋅ft (30.6 N⋅m) |
| Transmission | 6-speed, Chain |
| Suspension | 34mm Ceriani telescopic forks, twin Girling rear |
| Brakes | Drum brakes: 230mm Ceriani 4-leading shoe (front), 230mm Ceriani twin leading shoe (rear) |
| Wheelbase | 1,250 mm (49 in) |
| Weight | 108–112 kg (238–247 lb) (dry) |
| Fuel capacity | 19 L (4.2 imp gal; 5.0 US gal) |
References
edit- ^ "Harley Davidson RR250 Race Bike". May 2, 2013.
- ^ "Aermacchi 250 GP Racer | A two-stroke Harley GP machine! – MCNews". 23 May 2019.
- ^ "Titled in the US – 1975 Harley-Davidson RR250". Bike-urious. November 29, 2017.
- ^ "Harley Davidson RR-250 Road Racer".
- ^ "1975 Harley-Davidson RR 250". philsellers.com.
- ^ "Needs Some Work – 1974 Harley-Davidson RR250". Bike-urious. August 11, 2017.
- ^ "This two-stroke screamer is not the typical Harley". www.goodwood.com.