Engineered by Kawasaki for the naked motorcycle segment, the 2012 Kawasaki ER-4n utilizes a 399 cc (24.4 cu in) liquid-cooled twin, four-stroke layout.
On the scales, the ER-4n measures 203 kg (448 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 790 mm (31.1 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,410 mm (55.5 in) wheelbase engineered for quick, flickable steering geometry. The 15.5-liter (4.1 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Kawasaki archive, this model family spans 4 indexed model years from 2011 to 2014, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
790 mm (31.1 in)
Engine
Displacement399.0 ccm (24.35 cubic inches)
Engine TypeTwin, four-stroke
Engine DetailsTwin, four-stroke
Valves/Cylinder4
Fuel SystemInjection. Digital Fuel Injection
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionDigital CDI
LubricationWet sump
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet, cable operated
DrivelineO-Ring Chain
Chassis
Frame TypeSemi-double cradle, high-tensile steel
Rake25.0°
Trail120 mm (4.7 inches)
Front Suspension41mm hydraulic catrridege fork
Front Travel120 mm (4.7 inches)
Rear SuspensionSingle shock, swingarm
Rear Travel125 mm (4.9 inches)
Wheelbase1410 mm (55.5 inches)
Ground Clearance145 mm (5.7 inches)
Wheels & Brakes
Front Tyre120/70-R17
Rear Tyre160/60-R17
Front BrakesDouble disc. Optional ABS
Front Brake Ø300 mm (11.8 inches)
Rear BrakesSingle disc. Optional ABS
Rear Brake Ø220 mm (8.7 inches)
Dimensions & Weight
Weight incl.203.0 kg (447.5 pounds)
Seat Height790 mm (31.1 inches) If adjustable, lowest setting.
Overall Height1100 mm (43.3 inches)
Overall Length2100 mm (82.7 inches)
Overall Width759 mm (29.9 inches)
Fuel Capacity15.50 litres (4.10 US gallons)
Other
StarterElectric
Color OptionsWhite/Red/Black
Notes
Sold in Japan only. ABS brakes adds 4 kg to the weight.
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.
