Bad News For Kawasaki Ninja ZX-4R Owners - SUV VEHICLE

Bad News For Kawasaki Ninja ZX-4R Owners



  • Attention all Kawasaki Ninja ZX-4R owners: a recall is underway due to spark plug issues.
  • Engine stalling, misfires, and improper idling are potential risks due to damaged spark plugs on certain models.
  • Visit your nearest dealership if your bike falls within the affected VIN ranges for a free replacement of all four spark plugs.

Ever since it came out, the Kawasaki Ninja ZX-4R has been the talk of the town. Everyone who’s ridden it has had positive reviews, and whoever hasn’t direly wants to take it for a spin (including us). Now, over 365 days after its debut, there’s a hiccup for ZX-4R fanatics. And by hiccup, we mean a recall. It affects all versions of the motorcycle, as confirmed by the National Highway Traffic And Safety Administration (NHTSA).

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The Kawasaki Ninja ZX-4R Recall Is Due To Spark Plug Issues

2023 Kawasaki Ninja ZX-4RR Track

According to Team Green’s report to NHTSA, some examples of the Ninja ZX-4R have suffered spark plug damage during the installation process. This can result in improper idling, misfires, and even engine stalling. While riding, the latter can cause a serious crash, which is what Kawasaki is trying to avoid with this recall. Oh, and it applies to all four spark plugs.

Kawasaki Explains The Issue As:

On certain units, the spark plugs may have been damaged during the vehicle manufacturing process. It may result in unstable idle, hesitation and in the worst case, engine stalling. There is a risk that the engine may stall due to the damaged spark plugs, increasing the risk of a crash.

Chronology Of The Defect

Team Green suggests the issue first came to light in December 2023 when its Chinese subsidiary (KMSH) reported multiple rough idling instances. This was followed by an investigation headed by Kawasaki’s quality control department. In January 2024, the spark plug supplier reported they were being cracked. Finally, in February, the team found out the spark plug installation tool was the culprit. It was tilted and applied lateral force that cracked the plugs. That brings us to the recall currently underway.

Over 1,500 Units Of The Kawasaki Ninja ZX-4R Are Affected

Green 2023 Kawasaki Ninja ZX-4RR KRT static front quarter shot

Kawasaki’s calculation reports 1,579 units are affected by the said recall. This includes all ZX-4R versions, meaning:

  • 2023 ZX-4RR KRT: 999 units
  • 2024 ZX-4R ABS: 140 units
  • 2024 ZX-4RR KRT: 140 units
  • 2024 ZX-4RR ABS: 180
  • 2024 ZX-4RR 40th Anniversary: 120 units

As you can see, the recall applies to both MY23 and MY24 bikes. The product dates lie between January 11, 2023 and November 14, 2023, with VIN ranges:

  • ML5ZXCP15RDA09931 to ML5ZXCP16RDA14989
  • ML5ZXCS10RDA09911 to ML5ZXCS10RDA14669
  • ML5ZXCS11PDA00082 to ML5ZXCS10PDA01482
  • ML5ZXCS11RDA09951 to ML5ZXCS13RDA13869
  • ML5ZXCS17RDA09971 to ML5ZXCS1XRDA14209

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If your Ninja falls in the range, then you’ll need to visit your nearest dealership. When there, the official engineers will replace all four of your bike’s spark plugs. Or if you’ve already faced the said issues and paid to get it fixed, Kawasaki also has a reimbursement plan in action.

Summary Of The Kawasaki Ninja ZX-4R Recall

  • Models affected: ZX-4R, ZX-4RR, ZX-4RR KRT, ZX-4RR Anniversary Edition
  • Potentially Affected Units: 1,579
  • Defect: Cracked sparkplugs
  • Remedy: Replacement of all four sparkplugs

Source: NHTSA


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