Which of the following is recommended for maintaining motorcycle stability during turns?

Leaning into the turn is recommended for maintaining motorcycle stability because it helps balance the motorcycle's center of gravity against the centrifugal force acting on the bike and rider during a turn. When a rider leans into the turn, the bike can maintain better traction and control, allowing for smoother and safer navigation of the curve.

This technique counters the natural tendency of the motorcycle to want to stand upright due to the forces exerted while turning. By leaning, the rider aligns their body with the bike, which aids in evenly distributing weight and helps in negotiating the turn more effectively.

In contrast, actions such as accelerating through the turn can destabilize the motorcycle if not done appropriately, while braking hard before a turn can shift weight forward, leading to losing control. Keeping the handlebars straight does not account for the necessary lean and can impede effective turning, potentially causing the motorcycle to tip over. Thus, leaning into the turn is the most effective method for maintaining stability.