hi will cbr 400 / 600 calippers fit my nc24 , i need to buy some with all the mounting brackets and anti dive mechanism, or is there a good and easy up grade i was thinking cbr 400 nc29 tri arm or gull arm but will they fit ?

Do you not have the origianl calipers?

The bikes you mention use the same type of 2 piston sliders so may well fit. But without the original brackets (anti-dive bracket etc) I don't think you will fit them.

I seem to have read people fitting cbr600 calipers but using the original brackets of the NC24.

yes i think you are right , i havent got the front calipers or the anti-dive etc so i am on the lookout for some, could do with finding out if any others will do

The brakets are an NC21 part number so they were designed for that bike, as far as im aware no other bike shares that part.