The very first step is to move the headlight away.Run the indicator lights in the new black plastic T-shaped Light Housing. In cases like these, you may install your rev counter with the following instructions to help you. Then install the wires. Remove the speedo. Put it on one of the studs at the back of the rev counter. Then take the side pin out of the speedometer. Jot down the wire color combinations. Loosen them just enough to allow you to twist the fitting as little as possible and with some resistance. The yellow\/black goes to the terminal between the ground and +12 volt terminals. Then remove the two allens that hold the mounting plate on the chassis. Remove the two allen screws from the back of the speedometer and keep all the parts. If you feel a little hesitant in removing your headlight, you might prefer to just let it dangle by the wire. Common nowadays are electronic rev counters that can be installed by the dealers you get them from. To easily remove, lubricate the speedo then twist it out of the rubber grommet that holds it in the mounting plate. Then take out all the used motorcycle parts of the rev counter.At the front of the mounting plate you will see three allens. Lubricate the little rubber receptacles and twist them a little.Just a few screws to tighten and knots to bolt and you're done. This information will become handy later on. If you decide to install the light cluster first, then it's the rear chrome cover second, then the black plastic T housing, then the plastic indicator plate, then the foam rubber gasket, and finally the front chrome cover.Next, install the tachometer. Then there are two "light housings" that contain three indicator lights each. Lube the housing, rotate and wiggle it into the grommet.Notice the two wires on the back of the speedo. Remove the allens and hold the horizontal black plastic light pod on.At the back of the speedo, there are two screws that will allow you to twist the fitting where the cable screws are on. Then install next either the light cluster or the speedo. This is a great help later on in avoiding some mistakes and will definitely help you finish faster. But for used motorcycle parts, rev counters usually come in just any wrapping without instructions or diagrams. Another black wire which has a covered end is the ring connector. Get the rubber grommet in the hole on the right which you can easily see as you look at the front of the face plate. Slide the speedo canister down the speedo cable with a good pair of pliers to loosen the cable. Black wire, for ground goes to the terminal marked (-), while the red\/black goes to the (+). The yellow wire, for light, goes in the hole at the back that the bulb pushes into. Afterwhich, you have to remove the indicator Motorcycle Tail Light Mould Manufacturers lights from the housing. This is for the light in your tachometer. This should form a T when you look at it from the front. Just make sure that wire can handle your headlight's weight. Easy isn't it?. I kept mine in a coffee mug and was able to account for all of them when I was putting everything back.The tachometer or the rev counter tells how much the speed of the engine of the motorcycle revolutions per minute (RPM).