WIRING LOOM FOR 50 to 172 conversion

HEY

i dont mean to sound dumb but when peple say you change the wiring loom for a 50 to a 172 conversion , do i have to change the grey box thing on the side of my typhoon frame and the cdi , isit posible for the bike to run with jus these too things changed to the 125 ones orr do i have to change the whooole of the electrics indicators head lightd etc ,

 

yeh u have to cahnge the cdi and the coil and shit to match the 125 loom... like runner loom runner cdi and stuff.... typh loom typh cdi....