| MODEL | YAMAHA SR 400 2004 - 2008 |
| Year | 2004 - 2008 |
| Engine Type | Four stroke, single cylinder, SOHC, 2 valves per cylinder |
| Displacement / Capacity | 399 cc / 24.3 cu in |
| Bore X Stroke | 87 x 67.2 mm |
| Compression Ratio | 8.5:1 |
| Cooling System | Air cooled |
| Max Power | 16.7 kW / 22.93 hp @ 6500 rpm |
| Max Torque | 27.4 Nm / 20.2 lb-ft @ 3000 rpm |
| Ignition | CDI |
| Induction | Vacuum Mikuni BST34/1 carburettor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | Dry sump |
| Gear Box | 5 speed |
| Clutch | Wet, multiple disc |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Steel double cradle |
| Front Suspension | Telescopic fork, 150 mm / 5.9 in travel |
| Rear Suspension | Dual shocks, 111 mm / 4.3 in travel |
| Front Brakes | Single disc |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 790 mm / 30.9 in |
| Wheelbase | 1410 mm / 55.5 in |
| Ground Clearance | 130 mm / 5.1 in |
| Dry Weight | — |
| Wet Weight | 174 kg / 384 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.50-18 |
| Rear Tyre | 4.00-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 12 Litres / 3.2 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The last carburettor-fed generation of the SR400 before production paused in 2008 and the fuel-injected bike returned in 2010. The source describes it as a 30th Anniversary Limited Edition, mechanically the standard 399 cc kick-start single with a Mikuni BST34 carburettor.
