Yamaha
RD400
RD50
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LC | RD125 LC
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| RD250 Gallery
| RD250LC |
RD350 LC | RD350
YPVS | RD Restoration
| RD500 LC
| RD500 Gallery
| LC Tuning
| YPVS Tuning
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 |
 |
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 |
 |
- Air cooled, two stroke, parallel twin
cylinder.
- 43mpg
- 171kg
- 6 speed
- 35bhp @ 7000rpm
|
| 1976 Yamaha RD400 |
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| 1976 Yamaha RD400C |
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| 1976-79 Yamaha RD400 |
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- Air cooled, two stroke, parallel twin
cylinder.
- 43mpg
- 171kg
- 6 speed
- 35bhp @ 7000rpm
|
1976 Yamaha RD400C |
 |
|
| 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 |
 |
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
|
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| 1978 Yamaha RD400E |
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| 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 |
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| 1979 Yamaha RD400E |
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| 1979 Yamaha RD400 |
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1979 Yamaha RD400F |
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Yamaha
RD400 1981 road test |
| 1979 Yamaha Daytona 400 Special |
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| 1979 Yamaha RD400E |
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| 1979 Yamaha RD400F Daytona Special |
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| 1980 Yamaha RD400 |
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TZ250 shock, FZR400 front wheel, forks,
yokes and mudguard are TZR250. |
| 1981 RD400 Racer |
 |
1981 Yamaha
RD400 Street Racer test |
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