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2023 Kawasaki Ninja ZX-4R Receives CARB Approval

2023 Kawasaki Ninja ZX4R Receives CARB Approval

ZX-4R certified by CARB

The California Air Resources Board has issued an executive order for Kawasaki Ninja ZX-4R, clearing the way for the long-rumored sportbike to be sold in the state.

The executive order was issued on Dec. 21, 2022, certifying a Kawasaki model going by the code “ZX400SP”.  As we were the first to report last August, Kawasaki had submitted Vehicle Identification Number data for a ZX400SP and a ZX400PP with the U.S. National Highway Traffic Safety Administration, identifying it as being powered by a 399cc four-cylinder engine.

Kawasaki uses the ZX designation for all its Ninja ZX sportbikes, such as the ZX-6R (ZX636), ZX-10R (ZX1002) and ZX-14R (ZX1400), so it’s easy to conclude “ZX400” would represent a Ninja ZX-4R. The ZX-4R is expected to be based on the Ninja ZX-25R (pictured at top) offered in Asian markets, and it goes by the code ZX250.

The ZX400 is also distinct from the existing Ninja 400 and Z400 models as they have different model codes (EX400 and ER400, respectively), and were already separately certified by CARB.

Interestingly, the CARB executive orders show the ZX-4R actually releases lower emissions than the twin-cylinder models, despite offering what is expected to be superior performance. The Z400 and Ninja 400 are certified to produce 0.3 g/km of hydrocarbons and 4 g/km of carbon monoxide, while the ZX-4R is certified at 0.1 g/km of hydrocarbons and 0.4 g/km of carbon monoxide.

In Indonesia, Kawasaki offers both a ZX-25R and a ZX-25RR. The double-R adds higher quality Showa suspension and a special KRT graphic scheme.

While the CARB order lists the ZX400SP, there’s no mention of the ZX400PP version. It’s important to note the “SP” doesn’t necessarily denote a higher end model. In Kawasaki’s nomenclature, the “P” at the end stands for the 2023 model year and the letter before that simply marks a different model variant.

In Indonesia, the ZX-25R is joined by a ZX-25RR that adds more premium Showa suspension and a Kawasaki Racing Team livery, but we don’t believe a ZX-4RR will be offered in the U.S. It’s more likely Kawasaki will only offer the ZX-4R with or without ABS, just as it does for it’s other ZX models.

Finding the right price for the ZX-4R will be vital. In Japan, the ZX-25R is priced at 847,000 yen (US$6,600), with special edition colors pushing it to 935,000 yen (US$7,300). The Ninja 650, by comparison, is priced at 913,000 yen (US$7,100). A ZX-4R should be even pricier.

The timing of the CARB executive order makes the ZX-4R a candidate to be one of the two models Kawasaki is teasing for a reveal on Feb. 1, likely alongside an updated Ninja H2 SX SE which has also been certified by CARB but has yet to be announced for 2023.


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