They don't say it directly but I'm assuming these are copper core ignition wires. If they are, I wouldn't recommend installing them unless you also intend to run resistor plugs.
My recommendation is to use Magnecor ignition wires if you're having misfire problems running plug gaps less than 1mm.
The Magnecor wires are not copper wires, just a (Electromagnetic Interference) EMI-supressing high quality replacement for the stock wires that, as they age, will break down at lower voltages because of heat effects on the insulation. If the spark plug wires have inadequate insulation, the wire cannot maintain a high enough voltage across the insulation to fire the plug gap. The factory spark plug leads are stranded wire covered with an EPDM jacket and although the wire itself will last a long time, the jacket will start to break down after a couple of years which is why most good aftermarket wire is insulated with silicone.
You could also use carbon core wires, preferably carbon wires with a spiral wrap center conductor. Straight, multi-stranded, unshielded wire conductors offer theoretical gains, but produce lots of electromagnetic interference (EMI).
The big problem is with the computer used on fuel-injected bikes as the radiated EMI can interfere with the computer and corrupt signals which can affect engine performance.
