At the heart of the 2017 Yamaha X-MAX 400 scooter motorcycle, Yamaha features a 395 cc (24.1 cu in) liquid-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 32.9 HP (24 kW) at 7,500 rpm while maximum torque reaches 36 Nm (26.6 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 83.3 HP per liter and a 1,500 rpm working window between peak torque (6,000 rpm) and peak power (7,500 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the X-MAX 400 measures 215 kg (474 lbs) wet (curb), translating to a power-to-weight ratio of 0.15 HP/kg (6.53 kg per horsepower). Rider ergonomics and chassis geometry center around a 785 mm (30.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,565 mm (61.6 in) wheelbase engineered for planted straight-line stability. The 14-liter (3.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 4 indexed model years from 2014 to 2017, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
83.3 HP/L
Power-to-Weight
0.15 HP/kg (6.53 kg/HP)
Power Band Window
6,000–7,500 rpm
Standover Height
785 mm (30.9 in)
Engine
Displacement395.0 ccm (24.10 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power32.9 HP (24.0 kW)) @ 7500 RPM
Torque36.0 Nm (3.7 kgf-m or 26.6 ft.lbs) @ 6000 RPM
Compression10.6:1
Bore x Stroke83.0 x 73.0 mm (3.3 x 2.9 inches)
Fuel SystemInjection
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionECU
LubricationWet sump
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
DrivelineV-Belt Automatic
Chassis
Front SuspensionTelescopic fork
Front Travel110 mm (4.3 inches)
Rear SuspensionUnit swing
Rear Travel110 mm (4.3 inches)
Wheelbase1565 mm (61.6 inches)
Ground Clearance105 mm (4.1 inches)
Wheels & Brakes
Front Tyre120/70-15
Rear Tyre150/70-13
Front BrakesDouble disc. ABS
Front Brake Ø267 mm (10.5 inches)
Rear BrakesSingle disc. ABS
Rear Brake Ø267 mm (10.5 inches)
Dimensions & Weight
Weight incl.215.0 kg (474.0 pounds)
Seat Height785 mm (30.9 inches) If adjustable, lowest setting.
Overall Height1385 mm (54.5 inches)
Overall Length2190 mm (86.2 inches)
Overall Width780 mm (30.7 inches)
Fuel Capacity14.00 litres (3.70 US gallons)
Other
StarterElectric
Color OptionsBlack, white, grey
Carrying CapacityUnderseat storage for two full face helmets, glove compartment.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
