L.O. Pixx.
Right then, no problem . Unless they are already blowing, you must have an M.O.T with the bike if from a dealer, try painting them with high temp engine paint, i did. lasted for ages. failing that, use plenty of W. D . Let it soak for ages.
There are plenty of replacement full sytems in the M.C.N adds. Easy job if you have a set of sockets/spanners. Do not force the nuts or you might damage a stud. Use more W. D. When putting back together, put together slack, than work front to back. Same with rad grill. I had one for 35.000 miles, traded for new fz6n , super bike, bad press but they all talk bollocks. Good luck. Nosbor.