To reduce your reaction time while riding a motorcycle, you should:

Covering the clutch and brake is essential for reducing your reaction time while riding a motorcycle. By covering these controls, you are prepared to respond quickly to any sudden changes in your environment, such as an obstacle or a need to slow down or stop. This position allows you to maintain better control of the motorcycle since your fingers are already positioned to engage the clutch or brake without having to take the time to reach for them. It fosters quicker decision-making and action, enhancing your overall safety on the road.

In contrast, keeping both hands off the handlebars would severely compromise your control of the motorcycle and increase the risk of losing balance. Staying in a straight lane, while important for safety, does not specifically enhance reaction time as it does not prepare you for unexpected hazards. Lastly, shifting gears frequently can distract you and may not directly contribute to faster reaction times, as it takes focus and attention away from potential immediate hazards. Overall, covering the clutch and brake is a proactive measure that significantly improves your readiness to react to changing road conditions.