The tracking characteristics of your motorbike have deteriorated. What might be the cause of this?

You answered correctly. If the tracking stability of your motorcycle is worse, possible reasons include uneven chain tension and worn swingarm bearings. An unevenly adjusted chain tensioner causes the rear wheel to become misaligned, which negatively affects how steadily and predictably the bike follows its line. Worn swingarm bearings allow excess movement in the rear suspension, resulting in instability and unsteady handling. The engine idling speed, however, does not affect the tracking characteristics. Always check your bike for proper chain alignment and ensure all bearings are in good condition for safe and reliable riding.