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Yamaha RD400

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Regarded by many as the ultimate "headbangers" bike, the RD400 was endowed with the dna of the companies two stroke road racing twins. Vivid acceleration, good handling, excellent brakes and a potential 110mph top speed combined with good looks to ensure the models popularity both on the road and on the track.

Quick pre-LC street racer. Fast enough for almost anyone with demon accelaration, but weak brakes. Engine wear will be the big problem along with rising prices caused by the Jap Classic brigade. Buy the final E-version with cast wheels and electronic ignition. Original pipes totally unobtainable. 398cc 2-stroke twin. 40hp, 365lb, 45mpg, 105mph.

Yamaha RD400 Yamaha RD400
  • Engine - 398cc, 2 stroke twin
  • Power - 40 bhp
  • Top Speed - 106mph
  • Dry Weight - 166kg (365 lb)
  • Consumption - 47mpg
  • Launched - 1976-1980
  • 1973-75 Yamaha RD400 1973-75 Yamaha RD400
    • Air cooled, two stroke, parallel twin cylinder.
    • 43mpg
    • 171kg
    • 6 speed
    • 35bhp @ 7000rpm
    1976 Yamaha RD400 1976 Yamaha RD400
    1976 Yamaha RD400C 1976 Yamaha RD400C
    1976-79 Yamaha RD400 1976-79 Yamaha RD400
    • Air cooled, two stroke, parallel twin cylinder.
    • 43mpg
    • 171kg
    • 6 speed
    • 35bhp @ 7000rpm
    1976 Yamaha RD400C Yamaha RD400C
    1977 Yamaha RD400 1977 Yamaha RD400

    Repainted frame and swing arm
    Bronze swing arm bushings
    Tapered roller stearing stem bearings
    Newer brake pads front and rear
    Stainless steel braided front brake line
    Drilled front rotor
    Wheels painted red
    Newer chain and sprockets
    Tires are Pirelli Super Sport Phantom +1 front 100/90 v 18 rear 4.00 v 18
    Forks have been semi polished
    Tomaselli clip-on handle bars
    Fiberglass seat/tail and side covers
    Moto Carrera rearsets

    Engine/Motor
    RD350 motor rebuilt w/400 bore kit

    Cylinder rebore by Moto Carrera
    Art Pro X piston kits
    Oem yamaha wrist pin/ small end bearings
    Replaced all seals and gaskets
    High temp paint
    Stainless steel bolt allen bolts
    Stock porting and compression
    Running 32:1 premix (automatic oil mix tank removed)
    Pro Flo reed spacers
    Boyseen dual stage fiberglass reeds
    Bored RD400 carbs with Y boot and K&N filter
    DG chamber
    Dyna electronic ignition

    1977 Yamaha RD400 RD400 Silver powder coated frame and wheels, twin disc conversion up front. JMC swing arm with adjustable shocks. One-off, handmade seat and base. Handmade front mudguard/fork brace.
    1977 Yamaha RD400E
    1977 Yamaha RD400E  
    1978 Yamaha RD400E Yamaha RD400E  
    1978 Yamaha RD400 1978 Yamaha RD400

    Fuel - 16.5 litres
    Wheelbase -1334mm
    Engine - Air-cooled 398cc (64 x 62mm) twin-cylinder two-stroke. Two 28mm Mikuni carbs, 6 speed.
    Chassis - Tubular steel double cradle; 35mm telescopic forks, front, no adjustment, twin shock rear, preload adjustable.
    Brakes - Single 267mm disc with single piston calliper front and rear.
    Tyres - 3.60 x 18 front, 4.10 x 18 rear.

    1978 Yamaha RD400E 1978 Yamaha RD400E
    1979 Yamaha RD400E 1979 Yamaha RD400E
    1979 Yamaha RD400 1979 Yamaha RD400E  
    1979 Yamaha RD400F 1979 Yamaha RD400F Yamaha RD400 1981 road test
    1979 Yamaha Daytona 400 Special 1979 Yamaha Daytona 400 Special
    1979 Yamaha RD400E 1979 Yamaha RD400E
    1979 Yamaha RD400F Daytona Special 1979 Yamaha RD400F Daytona Special
    1980 Yamaha RD400 1980 Yamaha RD400 TZ250 shock, FZR400 front wheel, forks, yokes and mudguard are TZR250.
    1981 RD400 Racer RD400 Racer 1981 Yamaha RD400 Street Racer test

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