§ 02 / Brand
DENSO
Denso spark plugs sit in our electrical range, with standard and iridium options for listed motorcycle applications. This is a focused selection for riders replacing a plug during servicing or keeping the correct spare ready for a ride. Start with the application and full plug reference, including any suffix, rather than choosing by appearance. Cross-check the bike model and year, and follow the specified plug type and gap guidance when comparing a standard replacement with an iridium option.
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DENSO — frequently asked questions
Common questions, straight answers. No fluff.
- Use the full bike application and plug reference. Denso recommends its catalogue or a confirmed cross-reference because dimensions, projection and heat range all affect selection. Check the exact model and year before ordering.
- Match the complete code. Our range lists U24ESR-N and U24ESR-NB separately, for example. Do not assume similar references are interchangeable without a confirmed application or cross-reference.
- Choose an iridium option only where it is specified for your application. Our range includes standard and iridium listings, but the material alone does not establish compatibility with your engine.
- Denso supplies plugs with a preset gap. It says some nickel plugs, particularly motorcycle applications, may require adjustment using a dedicated gapping tool. Denso says not to adjust iridium, platinum or Twin Tip gaps because their fine electrodes can be damaged.
- It describes how the plug transfers heat away from its firing end. Use the heat range specified for the engine rather than choosing another number as a general upgrade.
- Follow the motorcycle manufacturer’s service interval and inspection guidance. Denso notes that the interval may change with plug type, and recommends checking plugs regularly and replacing them when fouled or showing overheating damage.