I recommend the Magnecor wires.
http://www.magnecor.co.uk/default.htm Straight, multi-stranded, unshielded wire conductors offer theoretical gains, but produce lots of electromagnetic interference (EMI). The big problem is with the computer found used on fuel injected bikes as the radiated EMI can interfere with the computer and corrupt signals which can affect engine performance. The concern also goes for non-resistor plugs. Theoretically, they can provide more power, but the reality is that the noise produced can corrupt computer sensor signals and computer operation itself. It also raises hell with the radio in the vehicle next to you.