What effect does improper wheel alignment have on a motorcycle?

Answer: C — Increases tire wear and affects handling.

Improper wheel alignment on a motorcycle significantly affects both tire wear and handling. When the wheels are not aligned correctly, uneven tire wear occurs as parts of the tire make contact with the ground differently than intended. This leads to accelerated deterioration of the tires, which may necessitate more frequent replacements. Additionally, misalignment can adversely impact the motorcycle's handling characteristics, making it harder to control and increasing the risk of instability. Riders may experience difficulty steering, which can compromise safety, especially during cornering or in adverse weather conditions. Thus, the effect of improper wheel alignment is primarily negative, leading to increased tire wear and compromised handling.