Honda CBR400RR NC23 Tri-Arm (88-89), , NC29 Gull-Arm (90-94), VFR750F (90-93), VFR750R RC30 (88-90) oil pressure relief valve appearing to be in good usable condition.
Removed from engine number starting NC23E-10214… from which all engine parts appear to be okay, presumably the CBR400RR NC23 donor having been broken for parts due to accident damage.