The bulbs are all the same (1.7W) and the bush is the known T10.
In Portuguese: http://jjmaia.weebly.com/subestituir-lampadas-do-quadrante.html
Step 1: Remove Plastic
Unscrew the odometer cable to be easier to move;
Pulling (with some strength) the wires until the rubber's get out;
Change the light bulbs you want, and re-assemble everything.
Step 3: List of Bulbs
2 - Error Light (DC)
3 - Neutral Light (DC)
4 - Flasher light (not sure)
5 - High Beam Light (not sure)
6 - Odometer cable
It is noted that the bulbs sooner or later will burn (due to the electrical system), and LED's won't take long to burn to, so the solution is to make a DC circuit for the bike (see my other instructable).
I hope I was helpful.