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Yamaha SR 400

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Make Model

Yamaha SR 400

Year

1978 - 80

Engine

Four stroke, single cylinder, SOHC, 2 valves per cylinder.

Capacity

399 cc / 24.3 cu-in
Bore x Stroke 87 х 67.2 mm
Compression Ratio 8.5:1
Cooling System Air cooled
Oil Capacity 2.4 Litres
Lubrication Wet sump

Induction

VM32 carburetor

Ignition 

CDI
Starting Kick

Max Power

22.93 hp / 16.7 KW @ 6500 rpm

Max Torque

27.4 Nm / 20.2 lb-ft @ 3000 rpm
Clutch Wet, Multiple Disc

Transmission 

5 Speed 
Final Drive Chain
Frame Steel Double Cradle

Front Suspension

35mm Telescopic fork
Front Wheel Travel 150 mm / 5.9 in

Rear Suspension

Dual shocks, 5-way adjustable preload
Rear Wheel Travel 105 mm / 4.1 in

Front Brakes

Single disc

Rear Brakes

Drum

Front Tyre

3.50-19

Rear Tyre

4.00-18
Rake Caster Angle 27°
Trail 111 mm  /  4.4 in
Wheelbase 1410 mm / 55.5 IN
Seat Height 790 mm / 30.9 in
Ground Clearance 130 mm / 5.1 in

Wet Weight

174 kg / 384 lbs

Fuel Capacity 

12 Litres / 3.2 gal