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5 Must-Know Facts About Yamaha RD400

Nepal Auto Trader

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The RD400 is a 399 cc (24.3 cu in) two-stroke air cooled six-speed motorcycle produced by Yamaha from 1976 until 1979. It evolved directly from the Yamaha RD350 The 350 evolved into the RD400C in 1976, the "D" and "E" in '78–'79 and the final model, the white 1979 RD400F. The model year for the first RD400, which was sold in the U.S. in the summer of 1975, was 1976. The brakes were single disc front and rear. It could complete a standing quarter-mile in 14.01 seconds. The RD400C was the first motorcycle by a major manufacturer to be fitted with cast wheels. 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. Here are the 5 must know facts about Yamaha RD400:

1. Availability:

The motorcycle was available with four different names that were primarily used to differentiate the model year. The year 1976 named the same RD400C while 1977 was the year when it was branded as RD400D. In 1978, the model was tagged as RD400E and finally in 1979, it was branded as RD400F. The motorcycle is available in the used market with a price tag of around $4000 (INR 2.84 lakh approx) in a decent condition in other countries as Indian market never got the same at all.

2. Design & Style:

The motorcycle comes with retro-modern bits of styling, with old age lines being a primary part of the profile. The fuel tank is long and sleek while alloy wheels add a touch of premium feel to the motorcycle. It was available in various colours throughout the life cycle and above all, the sporty stripe colour variant looked great for a motorcycle carrying a limited displacement capacity. 

3. Power Output:

The 398cc, two-stroke twin-cylinder engine on the motorcycle is good for 44 HP of maximum power at 7500 rpm and 41.1 Nm at 7000 rpm. The engine comes mated to a 6-speed gearbox. The powerful machine weighs 171 kg and thus, claims to be more powerful on paper in comparison to the present day Yamaha machines like R3. The capabilities for the model are far beyond an average rider’s comparison.

4. Dimensions & Capabilities:

Yamaha RD400 measures 1995mm in length, 760mm in width and 1060mm in height. The wheelbase measures 1320mm while seat height on the model is 800mm. The ground clearance for the model is 150mm. The dry weight for the motorcycle is 165.5 kg while wet weight tips the scale at 171 kg. The motorcycle comes with a 16.5-litre fuel tank and claims a mileage of 43 mpg (18.28 kmpl approx). The top speed for the motorcycle is 172 kph.

5. Equipment on Offer:

Yamaha RD400 was available with 267mm of a disc brake at both the ends. The front rim measures 3.00S while the rear comes with 3.50S rim size. The front forks are telescopic while the rear comes dual shocks. The entire network of equipment makes you good for a quarter-mile time of 14.1 seconds, and that too reaching a top speed of 145 kph.

Yamaha RD400 Tech Specs

  • Engine: 398cc, 2-Stroke
  • Cooling: Air-Cooled
  • No. of Cylinders: 2
  • Fuel System: Carburettor
  • BorexStroke: 64mm x 62mm
  • Compression Ratio: 6.2:1
  • Max. Power: 44 HP @ 7500 rpm
  • Max. Torque: 41.1 Nm @ 7000 rpm
  • Gearbox: 6-Speed
  • Overall Length: 1995mm
  • Overall Width: 760mm
  • Overall Height: 1060mm
  • Wheelbase: 1320mm
  • Ground Clearance: 150mm
  • Seat Height: 800mm
  • Dry Weight: 165.5 kg
  • Wet Weight: 171 kg
  • Fuel Tank: 16.5-litres
  • Oil Capacity: 1.8-litres
  • Front Brake: 267mm Disc
  • Rear Brake: 267mm Disc
  • Front Tyre: 3.00S-18-4PR
  • Rear Tyre: 3.50S-18-4PR
  • Front Suspension Telescopic Forks
  • Rear Suspension: Dual Shocks
  • Starting System: Kick
  • Final Drive: Chain
  • Mileage: 18.28 kmpl
  • 0-400m: 14.1 secs
  • Top Speed: 172 kmph


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