GMAT Critical Reasoning (CR) | Re: While motorcycles with larger, more powerful engines generally

While motorcycles with larger, more powerful engines generally accelerate faster and achieve higher speeds than do motorcycles that have smaller engines, the majority of motorcycle crashes involve motorcycles with smaller engines. Therefore, to improve the safety of people who ride motorcycles, we should encourage them to ride motorcycles with larger, more powerful engines.

Which of the following if true most seriously weakens the argument above?

A. More experienced and knowledgeable riders