Luxeon makes a Rebel series of high-ouput LED emitters that can be batched by them, or you. They are WAY over the legendary 100lumen/watt mark with their multi-emitter products like this one:
http://www.luxeonstar.com/Cool-White-56 ... -wc310.htm
It puts out ~1700 lumen at 700mA which is the max they recommend, though they show information for up to 1000mA, outputting 2240 lumen. That is comparable to the average car's halogen headlight. I don't know what sort of lumen the stock CB77 headlight produces, but it doesn't hold a candle (pun) to most automotive bulbs. The part is that the LED pack will use only between 8-11 watts.
Luxeon also sells the proper controllers that are externally dimmable which means you can retain a real high/low beam. They currently have two useful cluster lenses that aim the beam pattern in either a 12 or 50 degree spread. I chose 50 degrees, personally, to see if I can use some of the stock diffusers in the the Honda headlight lens and to avoid blinding oncoming traffic.
Now the annoying parts of the conversion. First off, the LED pack and board are 40mm in diameter with a round, flush-fitting heat sink. This reveals two issues: the bulb fitting in the headlight rear backing/reflector is less than 40mm and the 40mm round heat sink doesn't offer great heat spreading. The first issue is resolved by making a custom back to the headlight back and/or by removing it from the lens to mount the LED "bulb" from the inside. The heat issue is one I'm going to have to play with. I'll assume it gets pretty hot inside that headlight, especially when the better part of 2000 lumen of light is being produced. We'll see if those LEDs can stand up to it!
Without need for the headlight backing as a reflector, I figure it may be possible to drill some holes in it to let some heat into the hollow, steel, slightly ventilated actual headlight case that mounts to the fork ears.
Parts are on order as well as an aftermarket headlight (so I don't booger up my factory one), I guess we'll see!
