| MODEL | YAMAHA SR 400 2018 - 2021 |
| Year | 2018 - 2021 |
| Engine Type | Four stroke, single cylinder, SOHC, 2 valves |
| 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 | — |
| Max Torque | — |
| Ignition | TCI |
| Induction | Fuel injection |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| 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 |
| Front Brakes | — |
| Rear Brakes | — |
| DIMENSION SPECS | |
| Overall Length | 2085 mm / 82.1 in |
| Overall Width | 750 mm / 29.5 in |
| Overall Height | 1090 mm / 43.1 in |
| 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 | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | 12 Litres / 3.2 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The final-generation fuel-injected SR400, still a kick-start-only, air-cooled single with a slim steel double-cradle frame. It stayed in production in Japan until 2021, offering the same retro appeal that made it a favourite for custom builds.
