Naked Motorcycles
1984Yamaha XS 400 DOHC
19 fields on record
The 1984 Yamaha XS 400 DOHC is a lightweight sport-touring middleweight ideal for novice riders and commuters seeking reliable performance. Powered by an efficient air-cooled 399cc twin engine with DOHC technology, it delivers 45 horsepower with excellent fuel economy. Best known for its nimble handling, manageable weight, and practical versatility, the XS 400 became a popular stepping-stone motorcycle.
- Capacity
- 399.0 ccm
- Engine
- Parallel Twin
- Gearbox
- 6-speed
- Wet weight
- 187.0 kg
- Seat height
- Not on record
Know it? Add it → - Power
- 45.0 HP (33.1 kW) @ 9500 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- It's best suited for light commuting, weekend backroad rides, and easy sport-touring rather than serious speed or distance work.
- Built for
- The air-cooled DOHC twin has a classic, understated charm that rewards smooth, relaxed riding over aggressive throttle use.
- Not ideal for
- This is not the bike for riders seeking high-speed thrills, off-road capability, or serious long-haul touring comfort with a passenger.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 399.0 ccm
- Power
- 45.0 HP (33.1 kW) @ 9500 RPM
- Engine type
- Parallel Twin
- Power/weight ratio
- 0.2406 HP/kg (wet)
- Bore x stroke
- 69.0 x 53.4 mm
- Compression
- 9.7:1
- Cooling system
- Air
- Valves per cylinder
- 2
- Torque
- Not on record - add it
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
Performance
- Top speed
- 168.0 km/h (104.4 mph)
Dimensions & weight
Brakes & wheels
- Front brakes
- Single disc
- Rear brakes
- Expanding brake
- Front tyre
- 3.00-18
- Rear tyre
- 4.10-18
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 | 1982 | 1984 | 1986 | 1988 | 1990 |
|---|---|---|---|---|---|
| Capacity | 399 cc | 399 cc | 399 cc | 399 cc | 399 cc |
| Fuel capacity | 18 L | 18 L | 18 L | 18 L | 18 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 XS 400 DOHC?
The 1984 Yamaha XS 400 DOHC has a Capacity of 399.0 ccm (24.35 cubic inches).
What engine power does the Yamaha XS 400 DOHC have?
The 1984 Yamaha XS 400 DOHC has a Power of 45.0 HP (33.1 kW) @ 9500 RPM.
How many gears does the Yamaha XS 400 DOHC have?
The 1984 Yamaha XS 400 DOHC has a Gearbox of 6-speed.
How much does the Yamaha XS 400 DOHC weigh?
The 1984 Yamaha XS 400 DOHC has a Wet weight of 187.0 kg (412.3 pounds).
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