Yamaha SR 400
- Production years
- 2002–2019
- Brand
- Yamaha
Choose model year
1 / 7
Selected year: 2019
Technical specifications
- Engine capacity
- 399 cm³
- Power
- 23 hp (17 kW) at 6,500 rpm
- Wet weight
- 174 kg
- Seat height
- 785 mm
Overview
The Yamaha SR 400 is a naked motorcycle produced from 2002 to 2019. The 2019 model uses a 399.0 cm³, air-cooled single-cylinder four-stroke engine making 23 hp (17 kW) and 27.4 Nm of torque at 3,000 rpm; its wet weight is 174 kg.
The 785 mm seat height and 750 mm width give the bike a compact footprint, while its 174 kg wet weight still needs to be managed during low-speed maneuvers. The engine's peak torque arrives at 3,000 rpm, so it delivers its strongest pull at relatively low engine speed. Fuel consumption is 3.60 liters/100 km, with a calculated full-tank range of about 333 km from the 12-liter tank. It starts by kick lever, and the rear brake is a drum.
Specifications
Engine
Engine
- Bore x stroke
- 87.0 x 62.7 mm
- Engine capacity
- 399 cm³
- Compression ratio
- 8.5:1
- Cooling system
- Air
- Engine type
- Single, four-stroke
- Fuel system
- Injection
- Ignition
- TCI
- Lubrication system
- Wet-sump
- Oil capacity
- 2.4 L
- Starting
- Kick
- Valves per cylinder
- 2
Performance and transmission
Performance and transmission
- Co2 emissions
- 83 g/km CO₂
- Fuel consumption
- 3.6 L/100 km
- Power
- 23 hp (17 kW) at 6,500 rpm
- Power weight ratio
- 0.1507 HP/kg (dry)
- Torque
- 27.4 Nm at 3,000 rpm
- Clutch
- Wet, Multiple Disc
- Final drive
- Chain
- Gearbox
- Manual 5-speed
- Transmission type
- Manual
Dimensions and weight
Dimensions and weight
- Dry weight
- 152 kg
- Fuel capacity
- 12 L
- Ground clearance
- 130 mm
- Overall height
- 1,095 mm
- Overall length
- 2,085 mm
- Overall width
- 750 mm
- Seat height
- 785 mm
- Wet weight
- 174 kg
- Wheelbase
- 1,410 mm
Chassis and suspension
Chassis and suspension
- Frame
- Semi Double Cradle
- Front suspension
- Telescopic
- Front wheel travel
- 150 mm
- Rake
- 27.7°
- Rear suspension
- SwDual shock swingarm
- Rear wheel travel
- 105 mm
- Trail
- 112 mm
Brakes and wheels
Brakes and wheels
- Front brakes
- Single disc. Hydraulic.
- Front brakes diameter
- 298 mm
- Front tyre
- 90/100-18
- Rear brakes
- Expanding brake (drum brake)
- Rear brakes diameter
- 150 mm
- Rear tyre
- 110/90-18
Colours and equipment
Colours and equipment
- Colours
- Retro Green, Onyx
- Warranty
- 12
Model years
2010
Power: 27 hp (20 kW) → 26 hp (19 kW)
2012
Power: 26 hp (19 kW) → 27 hp (20 kW)
2014
Power: 27 hp (20 kW) → 23 hp (17 kW); Torque: 29 Nm → 27.4 Nm
2016
Wet weight: 174 kg → 174.2 kg; Seat height: 790 mm → 785 mm; Fuel capacity: 12 L → 12.1 L
2018
Power: 23 hp (17 kW) → 27 hp (20 kW)
2019
Power: 27 hp (20 kW) → 23 hp (17 kW); Wet weight: 174.2 kg → 174 kg; Fuel capacity: 12.1 L → 12 L
| Specification | ||||||
|---|---|---|---|---|---|---|
| Engine capacity | 399 cm³ | 399 cm³ | 399 cm³ | 399 cm³ | 399 cm³ | 399 cm³ |
| Power | 23 hp (17 kW) | 23 hp (17 kW) | 23 hp (17 kW) | 23 hp (17 kW) | 27 hp (20 kW) | 23 hp (17 kW) |
| Torque | 27.4 Nm | 27.4 Nm | 27.4 Nm | 27.4 Nm | 27.4 Nm | 27.4 Nm |
| Wet weight | 174 kg | 174 kg | 174.2 kg | 174.2 kg | 174.2 kg | 174 kg |
| Seat height | 790 mm | 790 mm | 785 mm | 785 mm | 785 mm | 785 mm |
| Fuel capacity | 12 L | 12 L | 12.1 L | 12.1 L | 12.1 L | 12 L |
Pros and cons
Advantages
Strong pull at low rpm
Peak torque at 3,000 rpm gives the engine useful response without needing to rev it high.
Efficient fuel use
The 3.60 liters/100 km consumption figure pairs with a calculated range of about 333 km per tank.
Things to consider
Kick-only starting
Starting depends on a kick lever, with no electric starter as an alternative.
Rear drum brake
The rear uses a drum brake rather than a disc, so braking hardware is less consistent front to rear.
Rider fit
Rider fit calculator
Calculated in your browser
Don't know it? Leave this empty and we'll estimate it from your height.
Estimated from your height: 79 cm
How to measure
Stand barefoot with your back to a wall. Hold a book firmly between your legs, then measure from the floor to the top edge of the book.
Estimated ground reach
Both feet likely flat
You should have a stable stance at a stop, although seat width and suspension setup still matter.
Seat height
785 mm
Approx. loaded height
755 mm
Estimate assumes about 30 mm of suspension sag. Seat width, footwear, luggage and suspension settings can change real reach. Always sit on the motorcycle before buying.
Fuel range calculator
Enter your expected fuel consumption to estimate the distance on a full tank, with or without a fuel reserve.
Tank 12 L at 3.6 L/100 km
Lower consumption = longer range.
Estimated range
333 km
With 10% reserve
300 km
This is a planning estimate, not a measured result. Speed, route, weather, load and riding style can change real consumption.
FAQ
What is the engine size of the 2019 Yamaha SR 400?
It has a 399.0 cm³, air-cooled, single-cylinder four-stroke engine.
How much power does the 2019 Yamaha SR 400 make?
It produces 23 hp (17 kW) and 27.4 Nm of torque at 3,000 rpm.
How far can the SR 400 travel on a full tank?
Its 12-liter tank has a calculated range of about 333 km.
Does the Yamaha SR 400 have electric start?
No, it starts by kick lever.
