nx650 head. will actually fit on slr fmx xbr, xr, gb etc albeit they all have different hemisphere sizes. depends on your application I have one fitted to my xbr500 bored out to 103mm for the purpose of this advert. straight swap onto nx, slr, fmx 650s anyway I digress. it has been blasted and painted. on close inspection small chip in a valve seat. not on the mating face, but would benefit being swapped before use. getting harder and harder to source and half the price of something from Germany.