At the heart of the 2009 Kymco MXU 400 atv motorcycle, Kymco utilizes a 366.9 cc (22.4 cu in) single cylinder, two-stroke layout. Internal engine geometry specifies a bore and stroke of 81.0 x 71.2 mm (3.2 x 2.8 inches) with a 10.0:1 compression ratio.
On the scales, the MXU 400 measures 275 kg (606 lbs) dry. Rider ergonomics and chassis geometry center around a 843 mm (33.2 in) seat height — resulting in a taller command-style riding posture suited to medium-to-tall inseams, combined with a 1,217 mm (47.9 in) wheelbase engineered for quick, flickable steering geometry. The 15-liter (4 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Kymco archive, this model family spans 2 indexed model years from 2009 to 2010, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
843 mm (33.2 in)
Engine
Displacement366.9 ccm (22.39 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Compression10.0:1
Bore x Stroke81.0 x 71.2 mm (3.2 x 2.8 inches)
Fuel SystemCarburettor
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionC.D.I.
Transmission
Final DriveBelt (final drive)
Chassis
Frame TypeSP pipe
Front SuspensionDual A-Arm
Rear SuspensionDual A-Arm
Wheelbase1217 mm (47.9 inches)
Ground Clearance158 mm (6.2 inches)
Wheels & Brakes
Front Tyre24/8-12
Rear Tyre24/10-12
Front BrakesSingle disc
Front Brake Ø202 mm (8.0 inches)
Rear BrakesSingle disc
Rear Brake Ø202 mm (8.0 inches)
Dimensions & Weight
Dry Weight275.0 kg (606.3 pounds)
Seat Height843 mm (33.2 inches) If adjustable, lowest setting.
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.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
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.
