Engineered by Kymco for the atv motorcycle segment, the 2012 Kymco Maxxer 450i features a 442.9 cc (27 cu in) oil & air-cooled single cylinder, four-stroke configuration. 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 belt 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 Maxxer 450i measures 270 kg (595 lbs) dry, translating to a power-to-weight ratio of 0.12 HP/kg (8.18 kg per horsepower). Rider ergonomics and chassis geometry center around a 855 mm (33.7 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control. 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 4 indexed model years from 2010 to 2021, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
74.5 HP/L
Power-to-Weight
0.12 HP/kg (8.18 kg/HP)
Power Band Window
5,500–7,500 rpm
Standover Height
855 mm (33.7 in)
Engine
Displacement442.9 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)
Fuel SystemInjection. EFI
Fuel ControlOverhead Cams (OHC)
CoolingOil & air
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
DrivelineAutomatic CVT F¬N¬R, Shaft Drive with low/high gear and on demand 2WD/4WD
Chassis
Frame TypePipe Under Bone
Front SuspensionIndependent Dual Aarm
Rear SuspensionIndependent Dual Aarm
Wheels & Brakes
Front Tyre23/8-12
Rear Tyre23/10-12
Front BrakesDouble disc
Front Brake Ø202 mm (8.0 inches)
Rear BrakesSingle disc
Rear Brake Ø202 mm (8.0 inches)
WheelsAlloy wheels
Dimensions & Weight
Dry Weight270.0 kg (595.2 pounds)
Power/Weight0.1222 HP/kg
Seat Height855 mm (33.7 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.
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.
