Engineered by Kymco for the atv motorcycle segment, the 2012 Kymco MXU 450i IRS relies on a 443 cc (27 cu in) liquid-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 33 HP (24.1 kW) at 7,500 rpm while maximum torque reaches 34 Nm (25.1 lb-ft) at 5,500 rpm, transferring power to the rear wheel through a automatic gearbox and shaft drive (cardan) final drive. With a specific output of 74.5 HP per liter and a 2,000 rpm working window between peak torque (5,500 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 MXU 450i IRS measures 275.8 kg (608 lbs) dry, translating to a power-to-weight ratio of 0.12 HP/kg (8.36 kg per horsepower). Rider ergonomics and chassis geometry center around a 808 mm (31.8 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,217 mm (47.9 in) wheelbase engineered for quick, flickable steering geometry. The 17.79-liter (4.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
74.5 HP/L
Power-to-Weight
0.12 HP/kg (8.36 kg/HP)
Power Band Window
5,500–7,500 rpm
Standover Height
808 mm (31.8 in)
Engine
Displacement443.0 ccm (27.03 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power33.0 HP (24.1 kW)) @ 7500 RPM
Torque34.0 Nm (3.5 kgf-m or 25.1 ft.lbs) @ 5500 RPM
Compression9.0:1
Bore x Stroke89.0 x 71.2 mm (3.5 x 2.8 inches)
Valves/Cylinder4
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionElectric
LubricationWet sump
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveShaft drive (cardan) (final drive)
DrivelineShift on a fly 2WD to 4WD
Chassis
Frame TypeSteel
Front SuspensionIndependent Dual A-Arm
Rear SuspensionIndependent Dual A-Arm
Wheelbase1217 mm (47.9 inches)
Ground Clearance267 mm (10.5 inches)
Wheels & Brakes
Front Tyre24/8-12
Rear Tyre24/10-12
Front BrakesSingle disc
Rear BrakesSingle disc
Dimensions & Weight
Dry Weight275.8 kg (608.0 pounds)
Power/Weight0.1197 HP/kg
Seat Height808 mm (31.8 inches) If adjustable, lowest setting.
Overall Height1194 mm (47.0 inches)
Overall Length2123 mm (83.6 inches)
Overall Width1092 mm (43.0 inches)
Fuel Capacity17.79 litres (4.70 US gallons)
Other
StarterElectric
Color OptionsGreen, Red, Black
Notes
A limited edition model Kymco MXU 450i IRS LE is available at USD 6699.
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.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
