This study employed dynamic network analysis to investigate the role of central relational links within the motivational system of 59 English for Academic Purposes (EAP) learners. The findings suggest that these links are best understood as central relational nodes, which act as hubs that give structure and stability to the network and enable the flow of information between clusters of factors within the second language (L2) motivation system. Results also indicate that while the centrality values of these nodes are dynamic, fluctuating from week to week, these nodes are relatively stable in their roles. Furthermore, although the motivational trajectory of individual learners may differ significantly and various motivational factors and their connections appear, disappear, and reappear in the system, the stability of central relational nodes facilitates an emergence of recurring patterns. This suggests that a shared socio-cultural and educational context may reduce the unpredictability of L2 motivation.