ORO products are high-quality replacement parts and carry our guarantee of your satisfaction. Easy to install, but professional installation is recommended if unsure. 14721-GF6-010 SPRING, VALVE (OUTER) (NIPPON HATSUJO) 14751-GN5-911 SPRING, VALVE (INNER) (NIPPON HATSUJO) 14761-GN5-911 RETAINER, VALVE SPRING 14771-GB4-680 1SEAT, VALVE SPRING (OUTER) 14775-MA6-000 2COTTER, VALVE 14781-MA6-000 SCREW, TAPPET ADJUSTING 90012-333-000 NUT, TAPPET ADJUSTING 90206-001-000.