Does the NGK CR9EIA-9 fit the Yamaha YZF-R1 (2002–2003)?
Yes — the NGK CR9EIA-9 is a correct fitment for the Yamaha YZF-R1 (2002–2003).
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.