Does the NGK DR8EVX fit the Yamaha XJ 550 (1981–1984)?
Yes — the NGK DR8EVX is a correct fitment for the Yamaha XJ 550 (1981–1984).
Last verified: 22 July 2026 against 2 independent sources (Cross-brand plug correspondence (NGK + Denso catalogues), NGK UK Motorcycle Catalogue 2022 (official PDF)).
Brakes are safety-critical. Always confirm fitment against your owner's manual before purchase and installation.