Yamaha RD400

RD400

1978 Yamaha 400 DX
Manufacturer Yamaha Motor Company
Production 1976-1980
Predecessor Yamaha RD350
Successor Yamaha RD350LC
Yamaha RZ350
Class Standard
Engine Two-stroke straight-twin
Bore / stroke 64 mm × 62 mm (2.5 in × 2.4 in)
Compression ratio 6.2:1
Top speed 106.8 mph (171.9 km/h)[1]
Power 44 bhp (33 kW) @ 7,000 rpm[1]
Torque 30.3 lb·ft (41.1 N·m) @ 6,500 rpm[1]
Ignition type Kick start: points (CDI ignition from 1978)
Transmission 6-speed manual, chain final drive
Frame type Tubular twin cradle
Suspension Front telescopic forks; rear swingarm with twin rear shock absorbers
Brakes Single disc brake, front and rear
Rake, trail 27.5°, 110 mm (4.3 in)
Wheelbase 1,330 mm (52.5 in)
Dimensions W: 800 mm (31.5 in)
Seat height 800 mm (31.5 in)
Weight 165 kg (364 lb) (with 4.5 l; 1.2 US gal (1 imp gal) of fuel)[1] (wet)
Fuel capacity 16.5 l (3.6 imp gal; 4.4 US gal)
Oil capacity 1.6 litres (1.7 US qt)
Fuel consumption 30 to 42 mpg-imp (9.4 to 6.7 L/100 km; 25 to 35 mpg-US)[1]

The RD400 is a 399 cc (24.3 cu in) two-stroke air cooled six-speed motorcycle produced by Yamaha from 1976 until 1980. It evolved directly from the Yamaha RD350 The 350 evolved into the RD400C in 1976, the "D" and "E" in 77-78 and the final model, the white 1980 RD400G.

The brakes were single disc front and rear. It could complete a standard quarter-mile in 14.01 seconds.[1]

The RD400C was the first motorcycle by a major manufacturer to be fitted with cast wheels.[2]

In 1979 the RD was fitted with a capacitor discharge electronic ignition (CDI) unit as well as having thinner spoked cast wheels, a new foot peg position and some minor engine modifications.

See also

References

  1. 1 2 3 4 5 6 "Bike magazine". Bauer. May 1979. p. 71.
  2. ↑ Dain Gingerelli (January 1993). "RD Days". Cycle World: 86. Retrieved 2015-06-17.
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