Naked Motorcycles
2018Yamaha SR400
45 fields on record
The 2018 Yamaha SR400 is a lightweight, air-cooled retro cruiser ideal for riders seeking classic styling and simplicity. Known for its iconic design, kick-start ignition, and nimble handling, it appeals to enthusiasts who value vintage aesthetics and manageable proportions over modern performance features.
- Capacity
- 399.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 152.0 kg
- Seat height
- 785 mm
- Power
- 27.0 HP (20.1 kW) @ 6500 RPM
What’s new for the 2018 Yamaha SR400
vs the 2017| Spec | 2017 | 2018 |
|---|---|---|
| Power | 22.9 HP (16.7 kW) @ 6500 RPM | 27.0 HP (20.1 kW) @ 6500 RPM |
| Rear suspension | Swingarm | SwDual shock swingarm |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built for classic-styled city riding, short jaunts, and enjoying the mechanical simplicity of a kick-start single rather than for outright performance.
- Built for
- A charming, old-school retro roadster that rewards relaxed, unhurried riding with plenty of mechanical character.
- Not ideal for
- Not suited for highway touring, two-up long distances, or riders wanting strong acceleration and modern performance.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usRange and running costs
Worked out in your browser - nothing is sent to usBased on the maker's published fuel consumption and tank size. Real-world figures depend on how and where you ride, and the last litres of a tank are reserve. Prices shown greyed are examples - type your own.
Engine
- Capacity
- 399.0 ccm
- Power
- 27.0 HP (20.1 kW) @ 6500 RPM
- CO2 Emissions
- 83 CO2 g/km
- Torque
- 27.4 Nm (2.8 kgf-m) @ 3000 RPM
- Engine type
- Single, four-stroke
- Fuel consumption
- 3.60 litres/100 km (27.8 km/l)
- Power/weight ratio
- 0.1776 HP/kg (dry)
- Bore x stroke
- 87.0 x 62.7 mm
- Compression
- 8.5:1
- Cooling system
- Air
- Fuel system
- Injection
- Starting
- Kick
- Ignition
- TCI
- Valves per cylinder
- 2
- Lubrication system
- Wet-sump
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet, Multiple Disc
Dimensions & weight
- Wheelbase
- 1410 mm
- Overall length
- 2085 mm
- Overall width
- 749 mm
- Overall height
- 1095 mm
- Seat height
- 785 mm
- Dry weight
- 152.0 kg
- Wet weight
- 174.2 kg
- Fuel capacity
- 12.10 litres
- Ground clearance
- 130 mm
- Oil capacity
- 2.40 litres
Chassis & suspension
- Frame
- Steel Double Cradle
- Front suspension
- Telescopic
- Rear suspension
- SwDual shock swingarm
- Front wheel travel
- 150 mm
- Rear wheel travel
- 104 mm
- Rake (fork angle)
- 27.7°
- Trail
- 112 mm
Brakes & wheels
- Front brakes
- Single disc. Hydraulic.
- Front brakes diameter
- 298 mm
- Rear brakes
- Expanding brake (drum brake)
- Rear brakes diameter
- 150 mm
- Front tyre
- 90/100-18
- Rear tyre
- 110/90-18
Other
- Color options
- Galaxy Blue
- Warranty
- 12
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2002 | 2006 | 2012 | 2015 | 2018 | 2019 |
|---|---|---|---|---|---|---|
| Capacity | 399 cc | 399 cc | 399 cc | 399 cc | 399 cc | 399 cc |
| Dry weight | 152 kg | 152 kg | 152 kg | 152 kg | 152 kg | 152 kg |
| Seat height | 790 mm | 790 mm | 790 mm | 790 mm | 785 mm | 785 mm |
| Fuel capacity | 12 L | 12 L | 12 L | 12 L | 12.1 L | 12 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Yamaha SR400?
The 2018 Yamaha SR400 has a Capacity of 399.0 ccm (24.35 cubic inches).
What engine power does the Yamaha SR400 have?
The 2018 Yamaha SR400 has a Power of 27.0 HP (20.1 kW) @ 6500 RPM.
How many gears does the Yamaha SR400 have?
The 2018 Yamaha SR400 has a Gearbox of 5-speed.
What is the torque of the Yamaha SR400?
The 2018 Yamaha SR400 has a Torque of 27.4 Nm (2.8 kgf-m or 20.2 ft.lbs) @ 3000 RPM.
How much does the Yamaha SR400 weigh?
The 2018 Yamaha SR400 has a Dry weight of 152.0 kg (335.1 pounds).
Shop this bike
Affiliate linksWe may earn a commission from qualifying eBay or Amazon purchases made through these links. As an Amazon Associate I earn from qualifying purchases.
The 2018 Yamaha SR400 is a classic and reliable motorcycle with a retro design that harkens back to the glory days of biking. With a 399cc air-cooled single-cylinder engine, this bike packs a punch while delivering a smooth and enjoyable riding experience. The vintage styling of the SR400 is complemented by its modern features such as fuel injection and electric start, making it an ideal choice for riders who appreciate both aesthetics and functionality.
Overall, the 2018 Yamaha SR400 is a timeless and versatile motorcycle that offers a great combination of power, performance, and style. Whether you're a seasoned rider or a beginner, this bike is sure to impress with its classic design and modern features. With its reliable engine and comfortable ride, the SR400 is perfect for cruising around town or hitting the open road. If you're in the market for a dependable and stylish motorcycle, the 2018 Yamaha SR400 should definitely be at the top of your list.
Please log in or register if you'd like to leave a comment.
Own one? Add it to My Garage and write an owner review with an Owner badge.