I have fitted one in my spicy.
If you still can pop the top hats off,seals off and pump the bearings full of a good quality bearing grease.They come quite dry.Just chuck all the spare bits as not required for anything.
GPX adapter,spacers and springy thing if not required.
They really are very good and i bought 2,one as a spare.I would really recommend the grease though.
10 times better than the xtr one it replaced.