All the CRs have no provision for lights. the CDI ignition is ignition and only ignition. There are places such as "Baja" they offer or offered lighting kits to put lights on vehicles without lamps or you could go your route and use a battery that would be the only source of power for the lights, but when the battery dies you would have no lights till battery recharged...... If you find a used harness off a XL model you could adapt it for your purposes if you want road legal. If you are only looking for headlight & taillight, no brake light, look for XR or even a MR harness (all of these are Honda models) they will give you just the wires you need and you could adapt from there. Personally I would use the cheapest Honda harness I could find and draw out of it just the color coded wires i would need and just run your own harness. You can buy factory style wire connector kits from Kowa tools (
www.kowatools.com) look under Diagnostics and than electrical. Kit is expensive for initial purchase, but i have had mine for almost 20years, with all items refillable