Hello, i have a cbr 600 f4i unregistrated...
and are locking for a frame that i can register.
i'm asking if the f4i and f2 frame is the same?
does the parts from the f4i fit on the f2 frame?

 

Hi matey , do you mean PC 25 F2 !991-94 or are you taking about PC 35 F2 2002

 

I really cannot see that these two frames are even similar given the F2 PC25 was a 'steelie' as far as I can recall.
I think your best bet may be to have a look on eBay as they do sometimes have F Sport / F4i frames and V5s there.

 

These bikes share very little, and certainly not the frame.

What's the problem with the F4i frame? Kind of at a loss as to what you are trying to accomplish here. Only time I've heard of this issue is with stolen bikes, so I'm hoping you're not asking how to get a stolen bike registered.