I got a good deal on a Trail Tech Vapor speedo/tach and it's accompanying indicator light surround, and found that the rubber pregen indicator lamp sockets are very similar to Trail Tech's sockets, and that they plug right into the Trail Tech surround, so the intallation went very quickly. I capped off all the other wires, except the black tach wire, which I wired to the Vapor's red tach wire. The grounds and power go to the bike's accessory outlet, and all the wiring is tucked inside the headlight bucket. The water temp sensor threads right into the stock sensor hole in the thermostat housing.
I mounted the whole thing using Trail Tech's L-bracket, ground down and slipped under the fork lock housing and bolted in place with tiny stainless computer screws (not yet installed in this picture). It's a nice, low profile dash, and the speedo is actually accurate for a change. It also weighs about 4 oz, so it's a lot lighter than the stock fairing and instruments.