looked around and I think from what i've read they are. but I want to make sure they are the identical. I can get a clean title bike for really cheap and have been wanting to start a new project. I just don't want any problems when putting in the engine and subframe. thanks for any help

 

exactly the same frames

 

i just got done what you want to do now. I got a 2000 f4 frame with an 2003 f4i engine and subframe.
And it fits perfectly

 

cool, thanks for the replies