Which of these is a likely cause of 'wobble'?

Wobble in motorcycles is primarily caused by instability, often related to how the motorcycle is loaded. When a motorcycle is improperly loaded, it can distribute weight unevenly, which can affect stability and handling. This imbalance may lead to a situation where the vehicle starts to shake or “wobble” at certain speeds. Proper loading is crucial for maintaining good control and balance while riding.

While excessive acceleration, poor tire pressure, and overtaking traffic can affect stability or control in other ways, they are less direct factors contributing to a wobble specifically. Excessive acceleration might lead to other handling issues but is not primarily associated with wobble. Poor tire pressure can cause handling problems but generally influences traction and braking rather than wobble directly. Overtaking traffic introduces different dynamics but does not relate to the inherent stability caused by loading.