At the heart of the 2006 Kawasaki ER-6f sport motorcycle, Kawasaki utilizes a 649 cc (39.6 cu in) liquid-cooled twin, four-stroke layout. In factory specification, peak output is rated at 71.1 HP (51.9 kW) while maximum torque reaches 66 Nm (48.7 lb-ft) at 6,700 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 109.6 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the ER-6f measures 174 kg (384 lbs) dry, translating to a power-to-weight ratio of 0.41 HP/kg (2.45 kg per horsepower). Rider ergonomics and chassis geometry center around a 785 mm (30.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,405 mm (55.3 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 12 indexed model years from 2006 to 2017, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
109.6 HP/L
Power-to-Weight
0.41 HP/kg (2.45 kg/HP)
Standover Height
785 mm (30.9 in)
Engine
Displacement649.0 ccm (39.60 cubic inches)
Engine TypeTwin, four-stroke
Engine DetailsTwin, four-stroke
Power71.1 HP (51.9 kW))
Torque66.0 Nm (6.7 kgf-m or 48.7 ft.lbs) @ 6700 RPM
Compression11.3:1
Bore x Stroke83.0 x 60.0 mm (3.3 x 2.4 inches)
Fuel SystemInjection. 2 x Keihin fuel injection. Ø 38 mm
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionDigital
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
Chassis
Frame TypeDiamond, high-tensile steel
Rake24.5°
Front Suspension41 mm telescopic fork
Rear SuspensionOffset laydown single-shock with adjustable preload
Wheelbase1405 mm (55.3 inches)
Wheels & Brakes
Front BrakesDouble disc
Rear BrakesSingle disc
Dimensions & Weight
Dry Weight174.0 kg (383.6 pounds)
Power/Weight0.4084 HP/kg
Seat Height785 mm (30.9 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.
