What can be the consequences of having too much or too little air pressure in the tyres of the motorcycle?

Having too much or too little air pressure in your motorcycle's tyres significantly affects performance and safety.

1. Poor handling: Incorrect tyre pressure alters the motorcycle's balance and stability, making it harder to steer and maneuver, especially in corners. This is critical according to German traffic regulations, which emphasize safe vehicle operation.

2. Increased tyre wear: Tyres that are not properly inflated can wear out unevenly or more quickly. This not only impacts cost but also safety, as worn tyres can lead to accidents.

3. Lengthened reaction distance: While not part of the correct answer, it's important to note that improper tyre pressure can indeed affect braking distance, although the primary concerns in this context were handling and tyre wear.

Overall, adhering to the recommended tyre pressure is essential for ensuring optimal handling, longevity of tyres, and overall safety on the roads, as stipulated in German traffic laws.