Yamaha RD400

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Yamaha RD400
Also called RD400C, RD 400 C, RD 400
Production 1976 - 1979
Class Classic
twin, two-stroke
Bore / Stroke 64.0mm x 62.0mm
Compression ratio 6.2:1
Top Speed 109 mph (175 km/h)
Horsepower 42.11 HP (31.4 KW) @ 7500RPM
Spark Plug NGK B8ES '76-79
Battery YUASA 12N5-5A-3B '76-79
Transmission Gear box: 6-speed

Final Drive: chain

Clutch: Wet multi-plate
Final Drive Chain: 530x96
Front Sprocket 16T
Rear Sprocket 37T
Suspension Front: Telescopic Forks
Rear: Swingarm
Brakes Front: single disc
Rear: single disc
Front Tire 3.00-18
Rear Tire 3.50-18
Wheelbase 52.01 inches (1321 mm)
Length 78.5 inches (1994 mm)
Width 29.88 inches (759 mm)
Seat Height 31.5 inches (800 mm)
Weight 175.0 kg (wet)
Recommended Oil Yamalube 10w-40
Fuel Capacity 4.36 Gallon (16.50 Liters)
Related Yamaha RD250LC, Yamaha RD200, Yamaha RD250, Yamaha RD350, Yamaha RD400
Manuals Service Manual

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The Yamaha RD400 was a twin, two-stroke Classic motorcycle produced by Yamaha between 1976 and 1979. It could reach a top speed of 109 mph (175 km/h). Claimed horsepower was 42.11 HP (31.4 KW) @ 7500 RPM.

Engine[edit | edit source]

The engine was a air cooled twin, two-stroke. A 64.0mm bore x 62.0mm stroke result in a displacement of just 399.0 cubic centimeters. Fuel was supplied via a membrane.

Drive[edit | edit source]

The bike has a 6-speed transmission. Power was moderated via the Wet multi-plate.

Chassis[edit | edit source]

It came with a 3.00-18 front tire and a 3.50-18 rear tire. Stopping was achieved via single disc in the front and a single disc in the rear. The front suspension was a Telescopic Forks while the rear was equipped with a Swingarm. The RD400 was fitted with a 4.36 Gallon (16.50 Liters) fuel tank. The wheelbase was 52.01 inches (1321 mm) long.

1976 RD400-C[edit | edit source]

1977 RD400[edit | edit source]

1978 RD400[edit | edit source]

1979[edit | edit source]

  • Last year exported to US.

1976 - 1980 Yamaha RD 400[edit | edit source]

The Yamaha RD 400 has already become a classic in its own time. Fully equipped with speedometer, tachometer, hydraulically operated disc brakes on front and rear.

In Media[edit | edit source]

See Also[edit | edit source]

External Links[edit | edit source]

References[edit | edit source]