I use Denso iridium spark plugs in my cars and motorbike. Previously used other major Japanese brand (NGK), which are also good. Denso iridium plugs however give slightly better performance and noticeable decrease in ghost misfire that is often evident on motorcycles. This suggests better combustion due to a stronger spark. Iridium plugs are good for up to 100,000 km, although I would change every 50,000 myself. Highly recommend you try the correct Denso plugs for your vehicle. A little more expensive but good value in my opinion.
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The Denso product is well regarded for quality and performance
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Verified purchase: Yes | Condition: New
This solved a problem that I was having with a two stroke bike fouling brand new spark plugs.
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