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Denso Iridium spark plugs deliver OEM-specification ignition performance for motocross and powersports engines. Denso is Japan's second-largest spark plug manufacturer and the OEM supplier to Toyota, Yamaha, and other major manufacturers, with over 80 years of ignition system engineering expertise.
The ultra-fine iridium centre electrode requires lower voltage to spark than standard copper or platinum electrodes, improving ignition reliability, combustion efficiency, and throttle response. Denso's iridium plugs are designed to maintain consistent gap geometry over an extended service life, reducing the frequency of plug replacement compared to standard plugs.
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Denso is a Japanese automotive and motorsport components manufacturer established in 1949. Denso spark plugs are OEM-supplied to major motorcycle manufacturers worldwide and are available for motocross and off-road applications in standard and iridium formulations.
Each Denso plug is manufactured to tight dimensional specifications for correct electrode gap, heat range classification, and thread reach per engine application. Denso iridium plugs use a 0.4mm fine-wire iridium electrode that provides consistent ignition under high compression and reduced electrode fouling compared to standard copper plugs in 4-stroke applications.
