To enhance safety while riding, a motorcyclist should avoid which of the following?

Using artificial stimuli while riding a motorcycle can significantly impair a rider's judgment, reaction time, and overall awareness of their surroundings. Engaging in activities that distract the mind or alter the perception of reality can be detrimental to safe riding practices. For instance, using substances like alcohol or drugs, or even relying on extreme techniques to enhance sensations while riding, can lead to unsafe conditions that increase the risk of accidents.

On the other hand, riding with a passenger, wearing a helmet, and following traffic rules are all essential practices that enhance safety rather than compromise it. Riding with a passenger can be done safely with proper training and communication, wearing a helmet provides crucial protection in the event of a fall, and adhering to traffic rules helps ensure that the rider behaves predictably and legally on the road, thereby contributing to overall road safety.