Also I have found out that similar boxes were made for the NC23 (I have two of these, the only two I have ever seen!!!) MC18 & MC21. Also there seems to be two models of this box the earlier ones look like the one on my ebay listing and are stamped HRC and the later ones look identical but are not stamped HRC but instead just have a sticker saying Not for road use in japanese, they look like this (one of my NC23 ones, the other one I have looks just like the NC30 one):




And here is an identical NC30 one (note marked NKA instead of NKB like the NC23 one):

Very true, surely someone over the years has done some dyno testing? What also concerns me is people for years have been running the HRC cdi on bikes with the SS/SP carb kit for which its not designed. The F3 manual is dated 1990 and the SS/SP manual 1992 so if the HRC CDI was any good for the SS/SP bike honda surely would have used it instead of the little box of mystry?

True, we need someone that has a dyno in their garage to do a shed load if testing for us

Oddly enough i feel the need to buy this from you, dont wanna swap it for a 35 ignitech do you? used for 30 miles and comes with all the extra wiring

Afraid not I kinda need the cash as looking to buy something very special for the nc30

oooo come on tell all

so wait wait...your saying these are like the hrc cdi? could this explain why my bike is spewing out fire from the exhaust sometimes? maybe it altered my fueling making it abit too rich? maybe my bike shouldnt even have this box...my bikes carbs is pretty damn stock..all i did was just install 118/120 jets.

In theory it should only be used with the SS/SP race kit which is essentially just a carb kit, i cant see any benefits on a stock setup.

The HRC CDI is designed to be used with the TT F3 race kit which is a carb kit and a whole lot more, again i cant see the benefit of using it on a stock setup.

ah okay..soo whats included or whats different in the SS/SP kit compared to the stock carb?

It has different needles, emulsion tubes and rubber stacks and also no airbox is used