Hi, is it possible to change from the standard MC16 CDI units and up grade to later models, or to an ignition mapping type of set up?

Yes, you cna fit any of the other model's ign's but you will also need to change the fly wheels and pick ups.

However the RS and early F3's also used the mc16-ish style ign so there isnt much wrong with it.
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If I have to take the carbs off once more...

Hi, does that mean the the rs 250 cdi units can be fitted to the mc16 and they would work?

No, they dont plug and play.

But they are based on the same ideas using an RC valve controler etc etc.

HRC made 2 types of race ign for the '16 the first one used the stock cdi's with a HRC RC valve controller and an F3 harness (I have one of them for sale). The second type used a fully HRC system that didnt use the twin CDI's which is closer still to an RS.

You can't fit RS ign though to a stock 16 as you need the F3 crank cases.
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If I have to take the carbs off once more...

All this souds quite complicated, the reason for the inital question was i am finding it extremely difficult to find an stock MC16 CDI. thanks for the response.Brian

why do you need new CDI's?
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Honda nc23 CBR400 AERO 1986, 1990 honda NC23 Tri-Arm, 1987VFR400 NC24 Rothmans Rep, NSR250 MC16 1987, CL250s 1983. Moto guzzi zigolo 110cc 1958. Fantic 50cc 1972. Suzuki Cobra Race bike 500cc 2t 1975 , GP125 1975. Triumph T110 1954. BSA Thunderbird 1955. Ariel VB 600 1952, 1990 MuZ 125 etz.

i have been really struggling to find a replacement cdi for one that is u/s, however i think someone from the site has come up with one, I was trying to think ahead just in case i couldn't find one, of some viable alternative. Thanks for the feedback. B

Hey,hey!! sucess through this very site CDI now fitted wow!! what a lovely sound a twin cyclinder two-stroke, poetry in motion. B