As long as your bike is basically stock and the charging system is up to snuff it should work just fine for you with the 3-Ohm coils. But if you've added things that give additional electrical draw, things like HID headlights, grip or glove heaters, passenger intercom systems or other sound systems, additional lights - anything of that sort, then you would be better off going with higher resistance coils (5-Ohm) because they will reduce the power-demand of the ignition system, leaving power for your other requirements.