Which of the following is essential for maintaining optimal performance in motorsport?

Regular vehicle maintenance and inspections are crucial for maintaining optimal performance in motorsport. This practice ensures that all components of the vehicle operate effectively and safely during races. Regular checks on vital systems such as the engine, brakes, tires, and suspension can prevent breakdowns or failures that could compromise both performance and safety on the track.

Maintaining the vehicle in peak condition optimizes its handling, speed, and reliability, all of which are essential for success in competitive racing. Ignoring maintenance can lead to mechanical issues, affecting the driver's ability to perform well and increasing the risk of accidents or equipment failure.

While the other options may seem relevant in a broader context, they do not directly contribute to the immediate performance and reliability of the vehicle as maintenance does. Gaining weight does not improve performance, accumulating race entries does not guarantee success, and participating only in sanctioned events ensures compliance but is not directly related to vehicle performance.