  We revisit the the rare kaon decays $K\to \pi l^+l^-$ which are of interest
specially due to the recent measurements of the charged kaon decay spectra. We
compute the contribution of the 27-plet to the decay amplitudes in one loop
SU(3) Chiral Perturbation Theory. We estimate the resulting impact to be $\sim
10%$ to the branching ratios of the charged kaon decays, and also noticeably
influence the shape of the spectra. With current values of the constants $G_8$
associated with the octet and $G_{27}$ associated with the 27-plet, the
contribution of the latter pushes the spectrum in the correct direction for the
charged lepton spectra. We also discuss the impact for the neutral decay rates
and spectra.
