I have an 99 cbr f4 600. bought wheels for it and the hub is way smaller and the place where the disc bolts on the front seem to be a smaller bolt pattern? can anyone shed light do I have fri wheels or rr?

 

Hard to tell without a pic of the rims but F4 rim spokes and hub are large and wide. F4i rim spokes and hub are about half the size and straight instead of twisted. 600rr has the same hub as the f4i but the spokes are even more skinny. F4i rims will bolt straight up to the f4 but you need the complete wheel, spacers, and rotors for the front. Rear rotors are all the same. The f4i rims are way lighter than the f4 rims. I don't think the 600rr front will work but anything is possible. Also the f4/f4i both have 20mm axle. The 600rr is 25mm axle. So if your axle fits, then it's f4i.