The engine produces about 38 horsepower at the crank. This figure is a published engine output and can vary slightly by unit and testing method.
The 2005 Honda Rubicon 500 (TRX500FM) uses a 493cc four-stroke engine designed for trail reliability. Horsepower is commonly cited around the high 30s, with actual power at the wheels being lower due to drivetrain losses and operating conditions. This article breaks down what that horsepower means in practice for this model year.
Official horsepower context
The 2005 Rubicon 500 was built to offer dependable mid-range torque and usable power for trails and work tasks. Honda typically listed horsepower in the high-30s for this model year, acknowledging that wheel output will be reduced by the transmission, transfer case, and axles.
Note: horsepower figures are obtained under standardized dynamometer testing. Real-world numbers can vary based on maintenance, altitude, temperature, and added accessories (winches, tires, racks, etc.).
Understanding horsepower on this ATV
Before diving into the details, it helps to know how the rating is interpreted and what factors influence usable power on the trail.
What follows is a quick look at the major considerations that affect how much usable power you get from a 2005 Rubicon 500.
- Engine output (crank horsepower) is the maximum theoretical power produced by the engine itself.
- Drivetrain losses reduce horsepower at the wheels; the Rubicon’s power passes through a five-speed transmission, a transfer system, and differentials before reaching the wheels.
- Real-world factors such as tire type, vehicle weight, altitude, temperature, and engine wear influence how that horsepower translates to acceleration and hill-climbing ability.
In practice, many riders prioritize torque, gearing, and overall tractability over peak horsepower alone, since those factors more directly impact off-road performance.
Contextual comparisons
Compared with other 500-class ATVs of the era, the Rubicon 500 is typically regarded for steady mid-range power, good low-end response, and trail-friendly gearing rather than extreme top-end speed. Exact numbers can vary by unit and testing method, so use the published horsepower as a rough guide.
Ultimately, the 2005 Rubicon 500’s value lies in its reliability and predictable power delivery, which makes it a solid choice for trail riders who prioritize usability over raw horsepower.
Summary
The 2005 Honda Rubicon 500 is commonly cited to produce about 38 horsepower at the engine, with wheel horsepower reduced by drivetrain losses. For most riders, the practical takeaway is that this ATV delivers strong mid-range torque and dependable performance suitable for trails and work tasks, rather than chasing high peak horsepower alone.
How much horsepower does a 2004 Honda Rubicon 500 have?
How much HP does a Honda Rubicon 500 have? The Honda Rubicon 500 has a 28 horsepower engine.
Is the Honda Rubicon a good ATV?
The Honda Foreman - Foreman Rubicon excels in all these conditions. If you want an ATV that pulls, works, and lasts—this is the one. The Foreman lineup offers different configurations to match your workload and riding preferences.
What is the towing capacity of a 2005 Honda Rubicon 500?
With a towing capacity of over 1300 pounds, it can easily pull a large load.
How fast does a Rubicon 500 go?
The Rubicon 500, while slightly slower than its bigger sibling, offers a commendable top speed that can reach up to 60 mph under ideal conditions. This model is ideal for recreational riders who appreciate a blend of speed and manageability, especially on more technical trails where control is crucial.