  We present a generalization of Weinstein's morphism defined on $\pi_{2k-1} (
\textup{Ham} (M,\omega)) $. We use this morphism to show that for $n\geq 2$ the
Lie group $SU(2)$ induces an element in $\pi_3(\textup{Ham}
(\mathbb{C}P^n,\omega_\textup{FS}))$ of infinite order.
