In stock form, the 2002 Honda Rubicon 500 delivers roughly 28–29 horsepower, depending on the measurement standard used.
The Rubicon 500 (TRX500FA) was Honda’s mid‑size ATV for that year, powered by a 492cc four-stroke engine. Horsepower figures for vintage ATVs can vary because some sources cite SAE net ratings while others cite SAE gross ratings, and real-world testing can differ due to maintenance and modifications.
Engine horsepower in context
How horsepower is measured for ATVs
Horsepower figures for the Rubicon 500 are typically reported using different SAE standards. Net horsepower (the modern convention) tends to be lower than gross horsepower, which was more common in older promotional specs. As a result, you’ll see a small range in published numbers for the same engine.
Common figures you’ll encounter for the 2002 Rubicon 500
- SAE net horsepower (typical modern reference): about 28–29 hp
- SAE gross horsepower (older or promotional spec): about 30–32 hp
In practice, engine horsepower is often not the only factor that determines performance; drivetrain losses and tire setup mean wheel horsepower will be lower than engine horsepower.
Factors that can affect measured horsepower
Several factors can influence the horsepower reading of a 2002 Rubicon 500:
- Altitude and air temperature
- Engine wear, compression, and general maintenance
- Intake and exhaust condition, including any aftermarket parts
- Fuel quality and ignition timing
- Drivetrain losses from the transmission, differential, and tires
Overall, the measured figure can vary by environment and condition, so use published numbers as a baseline rather than an exact universal value.
Summary
The 2002 Honda Rubicon 500 typically produces about 28–29 horsepower in SAE net terms, with variations depending on measurement standards and engine condition. Wheel horsepower will be somewhat lower due to drivetrain losses. When evaluating or restoring a Rubicon 500, consider both the rating method and the vehicle’s condition to understand the real-world performance.