http://www.hamicad.co.uk/SV650_Radiator.html
Won't hurt it and also probably as good is a fenda extenda to keep the rubbish off and protect the front spark plug. Also consider a hugger to keep the back wheel crap off the shock but if you don't ride in the bad weather then it's up to you.
But if you skint go with the fenda at least seeing as it's £20.