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Yamaha XS 400

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Make Model

Yamaha XS 400

Year

1979 -

Engine

Four stroke, 180° parallel twin, SOHC, 2 valves per cylinder

Capacity

392 cc / 23.9 cu-in
Bore x Stroke 69.0 x 52.4 mm
Cooling System Air cooled
Compression Ratio 9.2:1
Lubrication Pressure-lubricated wet sump

Induction

2x Mikuni BS32 carburetors

Ignition 

Battery ignition - With contact breaker points 
Starting Electric & kick

Max Power

36 hp / 26.8 kW @ 8100 rpm

Max Torque

3.3 kgf-m / 23.8 lb-ft @ 8000 rpm
Clutch Wet multiplate

Transmission

6 Speed 
Final Drive Chain
Frame Tubular steel, semi-double cradle

Front Suspension

Telescopic fork

Rear Suspension

Dual shocks swing arm, preload adjustable

Front Brakes

Single disc

Rear Brakes

Single disc

Front Tyre

3.00-18

Rear Tyre

3.50-18
Wheelbase 1364 mm / 53.7 in
Seat Height 780 mm / 30.7 in

Wet Weight

182 kg / 401 lbs

Fuel Capacity 

14 Litres / 3.7 US gal