The AMP Moto RR produces a peak power of 33.5 hp and 66.3 lb-ft of torque. At just 275 pounds, it boasts a power-to-weight ...

These utilitarian machines have historically been used to access parts of the world unreachable on four wheels, and the vintage British marque BSA produced the first tailor-made dirt bike as early ...

motor that generates 42 horsepower and 485 lb ft (660 Nm) of torque. It boasts a power-to-weight ratio that’s heaps better than comparable 250cc dirt bikes, thanks to its sub-220-pound (100-kg ...

The larger the number the more powerful the engine. However, this doesn't necessarily equate to a set-in-stone maximum speed ...