Does the DENSO IW20 fit the BMW R90 S S (1973–1976)?
Yes — the DENSO IW20 is a correct fitment for the BMW R90 S S (1973–1976).
Last verified: 22 July 2026 against 2 independent sources (Cross-brand plug correspondence (NGK + Denso catalogues), Denso Motorcycle Spark Plug Catalogue (official PDF)).
Brakes are safety-critical. Always confirm fitment against your owner's manual before purchase and installation.
Where to buy the DENSO IW20 (price comparison)
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