Ducati 750ss 1987 swingingarm bearings

Hi I haven’t posted in a while . Went down the fb way and don’t find it that good .
Right I have striped my 750ss ( 1987 ) down found the problem with the oil pressure, electrical wire stuck in the crank shaft .
I need to replace the needle rollers in the engine that carry the swingarm pin .
Any help would be good guys x

Sorry fellas this was meant to be a 1997 . So sorry lots going on , only 10 years out