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Other measurements are often doubted or subject to misunderstandings, and the motorcycling press serves as an independent check on sometimes unrealistic sales and marketing claims. Many of these numbers are subject to variable methods of measurements, or disagreement as to the definition of the statistic. The parameters most often in contention for motorcycles are the weight, the engine output (power and torque), and the overall performance, especially acceleration, top speed, and [[Fuel economy in automobiles|fuel economy]]. With [[electric motorcycles and scooters]], the range between charges is often a pivotal measurement.
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[[File:Dragrace01.JPG|thumb|Two motorcycles at a ¼ mile (402 m) [[dragstrip]].]]
Motorcycle speed tests, especially at high speeds, are prone to variation due to human error, limitations in equipment, and atmospheric factors like wind, humidity, and altitude. The published results of two otherwise identical tests could vary depending on whether the result is reported with or without industry standard correction factors calculated to compensate for test conditions. Rounding errors are possible as well when converting to/from miles and kilometers per hour.<ref name=Ford2003>{{citation |last=
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