At the heart of the 2025 Suzuki KingQuad 400ASi atv motorcycle, Suzuki utilizes a 376 cc (22.9 cu in) air-cooled single cylinder, four-stroke layout. Internal engine geometry specifies a bore and stroke of 82.0 x 71.2 mm (3.2 x 2.8 inches) with a 9.0:1 compression ratio.
On the scales, the KingQuad 400ASi measures 265 kg (584 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 840 mm (33.1 in) seat height — resulting in a taller command-style riding posture suited to medium-to-tall inseams, combined with a 1,270 mm (50 in) wheelbase engineered for quick, flickable steering geometry. The 16-liter (4.2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Suzuki archive, this model family spans 11 indexed model years from 2011 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
840 mm (33.1 in)
Engine
Displacement376.0 ccm (22.94 cubic inches)
Engine TypeSingle cylinder, four-stroke
Compression9.0:1
Bore x Stroke82.0 x 71.2 mm (3.2 x 2.8 inches)
Valves/Cylinder4
Fuel SystemInjection
Fuel ControlOverhead Cams (OHC)
IgnitionElectronic Ignition
LubricationWet sump
CoolingAir
Transmission
GearboxAutomatic
Final DriveShaft drive (cardan) (final drive)
ClutchDry shoe, automatic, centrifugal type
DrivelineAutomatic variable ratio with reverse and selectable 2WD/4WD
Performance
ExhaustCatalyst-equipped
Chassis
Front SuspensionIndependent, double wishbone, coil spring, oil damped.
Front Travel170 mm (6.7 inches)
Rear SuspensionSwingarm, coil-spring, oil-damped
Rear Travel170 mm (6.7 inches)
Wheelbase1270 mm (50.0 inches)
Ground Clearance250 mm (9.8 inches)
Wheels & Brakes
Front Tyre25/8-12
Rear Tyre25/10-12
Front BrakesDouble disc
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Weight incl.265.0 kg (584.2 pounds)
Seat Height840 mm (33.1 inches) If adjustable, lowest setting.
Overall Height1220 mm (48.0 inches)
Overall Length2060 mm (81.1 inches)
Overall Width1145 mm (45.1 inches)
Fuel Capacity16.00 litres (4.23 US gallons)
Other
StarterElectric
Color OptionsFlame Red, Terra Green
InstrumentsLCD instrumentation includes speedometer, odometer, trip meter, hour meter, clock, fuel gauge and indicators for reverse, neutral, oil and FI (fuel injection).
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.
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.
