The procedure sounds like it's time consuming, but it really doesn't take that long. Give yourself at least an hour and take your time.
You might want to remove the headlight to make some of this easier, but you don't have to. If you make a mark on the headlight bracket and headlight housing with a grease pencil you won't have to re-align the headlight.

First you'll have to remove your speedometer:

• Remove the main harness where it attaches in the bottom of the assembly.
• Remove the speedometer cable.
• With a small phillips head screwdriver placed inside the trip odometer knob, remove the screw and the knob.
• Remove the two hex head bolts at the base of the assembly. I like using a t-handle wrench because it fits between the cables easier.
• Remove the nuts that hold the speedometer onto the back of the case.
• Remove the nuts that hold the indicator lights onto the back of the case.
• Carefully pull out the light bulbs from the speedometer (they're rubber press-ins).
• You should be able to lift out the speedometer now.
• Remove the two little screws that hold the indicator light cover onto the white plastic indicator light housing, but don't remove the bulbs yet.
• Remove the indicator light cover and the rubber grommet around it and you'll be able to get the metal cover off.
• Remove the two small screws that secure the main wiring connector to the bottom of the speedometer case.

Now you should have the speedometer out, the cover off, the back off, and the indicator light housing with their wires and all bulbs attached.

• The wires that attach to the indicator bulbs should have numbered tags on them. These correspond to the numbered openings in the new tach assembly. I'd double check to make sure they all match up so you don't have to open up the tach again to move bulbs around.
• If you're sure the numbers match up, remove the indicator bulbs.
• Your tach comes with two bulbs, each with a black and yellow wire attached to it.
  • Find one of the bulbs that attaches to the speedometer. It has a black and yellow wire
  • Snip both wires leaving enough room to strip some insulation from each wire (about the middle of each should be okay).
  • Attach the yellow wire of the new bulb to the yellow wire of the old bulb. Attach both yellow wires to the single yellow wire that leads to the wiring harness. You can solder these connections or get small female to female crimp connectors and a crimp tool from Radio Shack (get some extra connectors and practice on similar gauge wire first).
  • Do the same with the black wires.
  • Repeat the procedure with the other bulb.
  • Attach the main wiring connector onto the new case. Don't over tighten it!
• Place the tach into the new CF faceplate.
• Run the tach wires up into the case, plug it into the tach, but don't fit the grommet yet.
• Place the numbered bulbs into the corresponding holders in the new assembly, and the other bulbs into the tach and speedometer.
• Attach the speedometer and tach to the new case using the old nuts or the new ones supplied.
• Attach the entire thing to the front end with the hex head bolts.
• Insert the tach wire grommet.

• Carefully remove the plastic connector from the ignition module.
• Plug the tach connector into the module.
• Plug the original connector into the socket provided in the new wire.

That's it. One tach kit installed.