Recommended Spark Plugs for Honda TMX125 Alpha that You Should Know

New spark plugs on the engine.

Honda Philippines has two (2) recommended spark plugs to use for TMX125 Alpha 2021 for extended high-speed riding as indicated in the manual.


  • DPR8EA-9 (NGK)
  • X24EPR-U9 (DENSO)

For extended high speed riding

  • DPR9EA-9 (NGK)
  • X27EPR-U9 (DENSO)

Both recommended spark plugs are Japanese technologies.

NGK Spark Plugs

Since 1936, NGK, a Japanese business established in Nagoya, Japan, has been manufacturing spark plugs. The business is a well-known aftermarket provider and provides OEM spark plugs for numerous motorbike and automobile manufacturers. As a result, there is a significant probability that NGK will create a spark plug that works with your specific bike. Additionally, NGK has an American subsidiary that makes spark plugs in Sissonville, West Virginia.

Denso Spark Plugs

Like NGK, Denso is also Japanese company established in 1949 in Showa-cho, Kariya, Aichi, Japan. It was once a division of Toyota. The terms for "electricity" and "device" in Japanese were combined to create the company's name.


  1. Steffes, T. (2020, October 1). Our story [Blog post]. Retrieved from
  2. Chung, D. (2021, May 20). Best motorcycle spark plugs [Blog post]. Retrieved from
  3. DENSO. (n.d.). Japan | Global Network | Corporate Information | Who we are | DENSO Global Website [Blog post]. Retrieved from
  4. Denso. (2022, 29). DENSO at a glance [Blog post]. Retrieved from

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