Hi Dan, if you are going to trial the bike, it’s very simple, you only need the following
black with red band from alternator to the cdi unit
The two wires from the pick up to the cdi unit, green and a blue/yellow from memory
Black and green wire from cdi to ignition coil
Black/white and green from cdi to stop switch
if you are re powder coating frame I found it better to earth the cdi unit to the engine rather than the frame as the grounding is only for the engine, the green wire from cdi, doing this avoids any bad ground due to the powder coating
the white red is the neutral switch again not needed if you trialing the bike
colin at Tyoffroad has an updated cdi unit which works very well, this is a link to his site for these, don’t be alarmed at the price when they are back in stock they are not this price, he does get them in stock quite regular, they also come with very easy to follow instructions, by the way I have no link to Colin’s business just used his products in the past and found them very good
https://www.tyoffroad.co.uk/store/p283/CDI_UNIT_FOR_HONDA_TLR200_TLR250_RTL250_(REF.H079).html
hope this sort of helps
Gary