Horsepower (hp) = (Engine displacement in cc / 125) * (RPM / 5,252)
In your case, the engine displacement is 254cc. However, the formula also includes RPM (revolutions per minute), which you haven't provided. The RPM value affects the horsepower calculation.
Assuming a typical maximum RPM for a small engine in the range of 6,000-7,000 RPM, let's calculate the estimated horsepower for 254cc:
1. For 6,000 RPM:
Horsepower (hp) = (254cc / 125) * (6000 RPM / 5,252)
≈ 1.79 horsepower
2. For 7,000 RPM:
Horsepower (hp) = (254cc / 125) * (7000 RPM / 5,252)
≈ 2.14 horsepower
Therefore, based on these assumptions, a 254cc engine could produce approximately 1.79 to 2.14 horsepower, depending on the RPM.
It's worth noting that the actual horsepower of an engine can vary based on factors such as design, efficiency, and other specifications.