May be worth a look at
Switchback LEDs Take 2 for a possible alternative.
If you want an OEM type fitment checkout
Gixerhps kit--Original Post follows--
First off you need the LEDs, I bought mine from the bay of fleas
http://www.ebay.co.uk/itm/262493706731?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT(NB these have the wrong end connectors but thats not a problem, just snip them off)
Next Up Prep the bike
1) remove the middle inner fairing panel (the one under the nose cone used to access the parking lights)
2) remove 2 screws from each of the inner radiator airflow guide trim panels and remove them
3) depending on the size of you hand or if you want to create a little more room remove the front 1 or 2 screws from the outside of the fairing along the middle
4) remove the bulb holders from the front indicator lenses
Ok so at this point there are several different methods of splicing into the existing wiring depending on where you are on the Mcgyver scale, this was how I did it.
5) taking the 2 wires from the ballast resistors to the supplied connector , straighten the wire and pull them out then twist and force them into the back of the square connector supplied by Mr Kawaskai.
6) Test the indicator flashes, if it doesn't swap the wires around. Once working tape upto secure
7) take out one of the city/parking lights and push the red lead until the connector starts coming out of the rubber.
take one end of the patch lead supplied in the kit (the end with a fuse on) , and using a blunt object push the stripped end into the same hole as the red cable you just played with.
9) after carefully positioning the stripped end push the red connector back into the rubber and for good measure apply a touch of tape at the back for extra security
10) The fun bit. Getting the new LEDs into the Lenses. The rubber boots supplied are smaller than the hole and obviously don't have bayonet fittings. Once again you have options. My method was very crude and involved building up with gaffer tape before pushing in securely and then applying a bit more gaffer tape to the back (you're never going to see this so doesn't need to be pretty)
11) Tidy up all the loose cables using tape/zipties or whatever then pop all the panels back on
end result?
https://www.youtube.com/watch?v=uBZ_SuNQnAcJust noticed, my GTR has a "face"