1989/90 CB1/CBR400RR cam swap. What year 400RR cams fit?

[unclejemima]

Looking to put a set of CBR400RR cams into my 1989 Honda CB1 to get some extra BHP out if it

I've heard this a nice & easy, affordable swap.

I'm from Canada, so these 400cc bikes are VERY rare as is (only sold a few hundred CB-1's from what I've been told, and thats it. No 400RR or anything else) Please excuse my lack of knowledge

What year CBR400RR cam's would drop into my 89 CB1? Should I try and find a NC23 400RR to fit my NC27 (I think that is what the 89 CB1 is classified as)

Thanks kindly for the advice!

[amorti]

nc23 triarm. They're more likely listed by model designation than by year. nc23 aero > nc23 triarm > nc29 gullarm.

[unclejemima]

Why thank you kind sir! :)