To get a hotter spark, I use non-resistor plugs in my CBR. I read about how Honda uses a resistor in the spark plug cap, right above the spark plug. I found a site that describes how to take out the resistor http://www.kamware.com/vtr1000f/resistor1.htm.
The site describes how to do it to a two cylinder SuperHawk, but my old CBR had the same thing. It is actually easier than it sounds. All you need is a screwdriver having the right size head to fit in the sparkplug cap and still fit into the wide screw slot. The hardest part was finding 5mm screws. I did this modification over a year ago, and it runs great.