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Weyl semimetals have attracted intense interest for exhibiting chiral Fermion states. Strong nonlinear effects such as 2^nd harmonic generation and DC photocurrents via circular photogalvanic effect are seen. Less understood is the dynamic response of said chiral carriers. We present polarized transient reflectance of single nanoflakes of NbIrTe₄, employing ultrafast (140 fs) NIR pump and MIR probe pulses. We use a photo-elastic modulator to produce a ~50 kHz oscillation of the circular probe polarization from left to right handedness. DFT calculations predict the presence of 8 pairs of Weyl nodes with opposite chirality in the BZ of NbIrTe₄. We observe a typical transient response composed of a rapid (~500 fs) decay followed by a slow (~1 ns) relaxation. A sign change in the transient response is observed at ~0.5 eV, suggestive of a band-to-band transition between a band below the Fermi energy and near the Weyl nodes to some higher-lying state.