Your motorcycle no longer keeps the track. What can be defective?

The selected combination of options is correct because both a bent fork and a bent frame can significantly affect a motorcycle's ability to maintain its track on the road. This is crucial for safe handling and stability.

In German traffic regulations, a motorcycle must be in a safe and operable condition to ensure both the driver's safety and that of other road users. A defective fork or frame can lead to handling issues, increasing the risk of accidents. On the other hand, while a defective rear wheel brake can affect the stopping ability of the motorcycle, it does not directly cause tracking issues as indicated in the question. Thus, it is essential to recognize the specific components that impact tracking to ensure comprehensive vehicle safety.