When we launched the original Yamaha SR nearly 40 years ago it became a favourite with riders who favour simplicity and agility. After all, the big single is the grand daddy of motorcycles.
The level of interest in the timeless SR has remained strong over the years – with riders as well as custom builders. Offering endless possibilities, Yamaha’s SR400 continues to form part of the daily lives of a whole new generation of riders who appreciate the enduring appeal of this instant classic.
Air-cooled with fuel injection
At the soul of the SR400 is an air-cooled 4-stroke single cylinder SOHC 2-valve engine which is technically almost identical to the original design, with the major difference is the use of a new fuel injection system, which allows the bike to conform with current emissions regulations, and also makes the SR400 easier to start than the original model.
Our engineers wanted to ensure that the current model is true to its original character, and so the only way to start the new SR400 is to kick it. The SR400 runs an indicator on the right side of the cylinder head that shows when the piston is in the best position for starting, and a decompressor lever on the left side of the handlebar assists in starting the engine smoothly.
Light and Comfortable
The SR400 is equipped with traditional upright front forks that give 150mm of wheel travel for a smooth ride and easy steering. At the rear end this classic big single is fitted with a proven twin shock system that offers 100mm of suspension movement.
Throughout its long history, the SR400's fuel tank design has remained largely unchanged, with the only real 'update' over the years being different paint and graphics. The SR400 is equipped with the same familiar teardrop style fuel tank which is virtually identical to the original design, with the exception that the tank now offers a capacity of 12 litres.
|Engine Type||Air-cooled, 4-stroke, SOHC, 2-valve|
|Bore x Stroke (mm)||87.0 x 67.2|
|Compression Ratio||8.5 : 1|
|Lubrication System||Dry Sump|
|Fuel Management||Fuel Injection|
|Fuel Tank Capacity (L)||12.0|
|Transmission||Constant mesh 5-speed|
|Frame Type||Semi double cradle|
|Suspension Front||Telescopic forks, 150mm travel|
|Suspension Rear||Swingarm, dual shocks, 105mm travel|
|Brakes Front||Hydraulic single disc, 298mm|
|Tyres Front||90/100-18M/C 54S Tube type|
|Tyres Rear||110/90-18M/C 61S Tube type|
|Seat Height (mm)||785|
|Ground Clearance (mm)||130|
|Wet Weight (kg)||174|