YAMAHA SR400

  • 19/04/2016
  •  1,199 views

L sr400 197803 - YAMAHA SR400

Model Name:SR400

Manufacturer:YAMAHA

Model Year:1978

YAMAHA had converted the engine of the XT500 in a road sports style and brought the first Japanese single sports model, SR, to the market. This is the 400cc version of the SR. Though the simple design is the same as that of 500, the initial 400 featured additional specifications like the tail cowl without a grab bar.

Specifications:

[Basic spec]

Manufacturer YAMAHA Engine Type Air-Cooled 4 Stroke OHC 2-Valve Single Cylinder
Model Name SR400 Starter Kick Starter
Grade Maximum Output (ps) 27ps(20.0 kw)/7000rpm
Drive Train Maximum Torque (kgf/m) 3.0kg-m(29.4N-m)/6500rpm
Model Type Curb Weight 172
Displacement 399 Dry Weight 158
Sales Launch Year 1978/3 Fuel Efficiency by Catalog 41.0 km/L (at 60 km/h)
Height/Width/Length 1095/-/- Fuel Tank Capacity 12
Seat Height 790 Distance to Empty
Front Tire Indication Fuel Supply Carburetor
Rear Tire Indication

[Service data]

Standard Plug BPR6ES Chain Size 530
Number of Used Plugs 1 Chain Link Number 106
Engine Oil Amount 2.4 Battery Code
Engine Oil (Refill) 2L Headlight
Engine Oil (Element Replacement) 2.1L Headlight Type
Front Blinker Rating 12V 21w Headlight Remarks
Drive Sprocket Teeth Number 16 Tail Light Rating 12V 21w/5w
Driven Sprocket Teeth Number 47 Rear Blinker Rating 12V 21w

[Machine detail]

Motor Model Code Caster Angle 27.7 Degrees
Bore (mm) 87 Trail (mm) 111
Storke (mm) 67.2 Minimum Ground Clearance
Compression Ratio 8.5 Distance Between Axes
Ignition Method C.D.I. Streering Angle (Right)
Engine Lubrication Type Compulsory Force Feeding Dry Sump Turning Angle (Left)
Frame Type Steel Pipe Semi Double Cradle Mirror Screw Hole Diameter 10mm
Minimum Rotaion Radius 2.4 Fuel Tank Reserve Capacity

[Underbody detail]

Front Brake Type Single Disc Suspension Type (Rear) Swing Arm
Front Brake Remarks Number of Rear Shock Absorbers
Rear Brake Type Drum Rear Suspension Stroke
Rear Brake Remarks Rear Wheel Travel
Suspension Type (Front) Telescopic ABS
Front Fork Type Drive Train
Front Suspension Stroke Differential Oil Amount
Front Fork Diameter Chain Remarks

[Equipment]

Seat Lowering Allowance Theft Prevention Device
Mirror Screw Hole Diameter 10mm Tail Light Bulb Type S25
Mirror Remarks Use screw type mirror or reverse screw adapter. Tail Light Base Shape BAY15D
Electronic Device Remarks Tail Light Base Shape 2
Fuel Gauge Tail Light Remarks Glass Shape G18 Also Installable
Clock Front Blinker Bulb Type S25
Hazard Front Blinker Base Shape BA15S/BA15S

[Engine detail]

Clutch Type Tappet Clearance (mm) EX
Transmission Idling Initial Value (rpm)
Number of Gears 5 Needle Steps (Clip Location)
Gear Ratio 2.357 / 1.555 / 1.190 / 0.916 / 0.777 Float Level (mm)
Primary Reduction Ratio 2.566 Air Screw Return
Secondary Reduction Ratio 2.947 Main Jet Type
Variable Speed Vehicle Gear Ratio Main Jet Number
Tappet Clearance (mm) IN

[Other spec]

Clutch Cable Length 970 Rear Brake Cable Length
Choke Cable Length Other Cables
Meter Cable Length Engine Number (Production Launch)
Throttle Cable Length Engine Number (Production End)
Front Brake Cable Length

[See Moto Index of YAMAHA]
[See Accessories for YAMAHA SR400]

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