ok hears the situation. i recently purchased at 2000 cbr F4 600. The bike came with a F3 front rim. I have a mint F4i rim i want to put on it but i dont know what spacer or axel rod i need to put the f4i rim on my f4. i dont know if the spacer and axel rod i have are from the f4 or f3. so i need to know wether to purchase a f4 or f4i axel rod and spacer. i googled f4 f4i rim swap and found someone on another forum said it can be done. i pmed and posted but didnt get any response. also in the other forum the person said something about putting the spacer in backwards. thank you for your time in advance !!