Thanks Tomb. I will look into getting it done! Looked for a set of second hand ones but think they were off a CB900. Didn't say OKI MPS-200 on them so didnt buy.
Ste this is from your introduction post but I'll answer it here in case anyone does a search later.
I found some info on the Honda ignition modules,
Clicky, it appears the same as I had been informed about the IKO units, that they're the same unit on all the Hondas of that era. I bought some to try on my Yam XS1100 but went with the OE in the end, but kept the IKO units to convert my 500/4 to electronic (havn't bothered yet as the 500/4 points are so bloody reliable but thats another story
)
So you should be able to use any original Honda units from the models listed on the link