Approximately 105 horsepower at the crank for the 2005 Honda CBR600F4i, the 599cc inline-four sportbike this question refers to.
The F4i is the fuel-injected evolution of Honda’s CBR600 line, renowned for a broad powerband and balanced handling. For the 2005 model year, the CBR600F4i continued with a 599cc liquid-cooled inline-four that delivered peak power around 12,000 revolutions per minute. Honda’s official specs list this figure as the crank horsepower, while real-world numbers can vary with exhaust, intake, maintenance, and testing methods. The following section breaks down the horsepower figure and related engine specs to provide context.
Power figure and context
The following highlights reflect the official horsepower figure and closely related engine specs for the 2005 CBR600F4i.
- Engine: 599 cc liquid-cooled inline-four with fuel injection
- Peak horsepower: 105 hp at 12,000 rpm
- Peak torque: about 46 Nm (roughly 34–35 ft-lb) at around 9,000 rpm
- Redline: approximately 12,000 rpm
- Transmission: 6-speed
Note: Honda publishes the crank horsepower at 105 hp for the 2005 F4i. Rear-wheel horsepower will vary with exhaust configuration, air intake, maintenance, and measurement conditions; dyno results differ based on setup and testing environment.
Crank horsepower vs rear-wheel horsepower
The 105 hp figure refers to crank horsepower—the engine’s output before drivetrain losses. Rear-wheel horsepower is typically lower and depends on factors such as exhaust, air filter, tuning, and overall condition. Dyno results will vary accordingly, and there is no single fixed rear-wheel figure for all bikes.
Summary: The 2005 Honda CBR600F4i is officially rated at about 105 horsepower at the crank, driven by a 599cc inline-four with a 6-speed transmission. Real-world rear-wheel power can vary widely based on modifications and condition.