Denso

From factory-fitted originals to championship racing, Denso spark plugs are trusted by the world's leading motorcycle manufacturers as original equipment. As one of Japan's largest OEM parts suppliers, Denso builds every spark plug to the same exacting standards demanded on the production line — precision-engineered ignition that delivers sharper throttle response, easier starting, and reliable performance mile after mile.

Japanese OEM Precision Engineering

Denso isn't an aftermarket imitator — it's the original. Denso spark plugs come factory-fitted in millions of motorcycles worldwide, and every aftermarket plug is manufactured to identical OEM specifications in Japan. Denso pioneered the world's thinnest iridium centre electrode at just 0.4mm, requiring less voltage to generate a stronger, more focused spark. Combined with a purified alumina insulator and precision-rolled threads, Denso plugs deliver consistent combustion efficiency across every heat range.

Performance for Every Ride

The Denso Iridium Power range is the performance benchmark — its ultra-fine 0.4mm iridium electrode improves ignitability for crisper throttle response, smoother idling, and better fuel efficiency, making it a favourite upgrade for sport and track riders. For everyday commuting and touring, Denso's standard nickel plugs with patented U-Groove ground electrode technology provide dependable OEM-grade performance at exceptional value. Whatever you ride — from small-capacity commuters to litre-class superbikes — there's a Denso plug matched precisely to your engine's heat range and fitment.

Why Choose Denso Spark Plugs?

• Genuine Japanese OEM quality — factory-fitted by leading manufacturers
• World's thinnest 0.4mm iridium centre electrode for superior ignitability
• Sharper throttle response and easier cold starting
• Improved fuel efficiency and smoother idle
• Patented U-Groove technology on standard plugs
• Precise heat range options for every engine type
• Long service life with consistent spark performance

Shop Denso Spark Plugs at EasyR

At EasyR, we stock a comprehensive range of Denso motorcycle spark plugs at Australia's best prices. Enjoy free shipping over $50, easy returns, and expert fitment advice to match the right plug to your bike. Shop Denso Iridium Power and standard plugs today and experience genuine OEM ignition performance, straight from Japan.