I just did that mod to my 92 GMC last week, works great. Just used a 4 post relay, one wire to highpeam power, one to low beam power, one to contant power (battery) and the last one to ground. Also have a inline fuse in the constant power wire for safety.On the chevy trucks there is a relay you put in and then both of the light socme on the trucks!!
I don't know if you would need to do the same on the bikes[/b]