The infrared spectrum of the weakly bound complex CO-N-2 has been studied using a pulsed supersonic slit-jet and a rapid-scan tunable diode laser. A mirror system giving 182 passes of the laser through the jet helped to give improved spectra with lower effective rotational temperatures (approximate to 0.5 to 4 K) and less interference by CO dimer transitions. In the case of the CO-paraN(2) spin modification, for which only one subband was previously known, over 10 linked subbands were assigned in terms of three ground (upsilon(CO) = 0) state stacks of levels (with K = 0 and 1), and 7 excited state (upsilon(CO) = 1) stacks (with K = 0, 1, and 2). In the case of the more abundant form, CO-orthoN(2), an excited bending state was observed for the first time. The infrared analysis relied on precise ground state energy level differences obtained from microwave data.