i have an 06 600rr radiator looks kinda like my f3 radiator any 1 kno if it will work on my 98 f3

 

A radiator is a radiator. Since it's off a 600, I would think it has the cooling capacity that you'd need. If you can physically get it to fit, and the hoses are in the right place, or at least close and you can get it connected I don't see why you couldn't use it. Remember you need to attach the cooling fan as well. I'd also check the stats to find out what the temp is that the Thermo-Switch turns on the cooling fan and compare that to the F3.

Good luck and post back to let us know how it goes and what if any mods you have to do to make it work. Pictures would be great too.