Question 1

Why are kei cars limited to 660cc?

Accepted Answer

The 660cc displacement limit was set in 1990 as the highest of progressive increases since the original 100cc limit in 1949. The limit balances providing useful power for daily driving while maintaining the kei category as a distinct, smaller-vehicle classification. The limit has remained 660cc for over 30 years.

Question 2

Can kei cars be imported to the US?

Accepted Answer

Yes, after 25 years of age. A 1990s kei car (Suzuki Cappuccino, Honda Beat, etc.) can be legally imported to the United States now. Younger kei cars must wait. Some states have additional restrictions; California has been particularly strict on imported kei trucks. Import processes vary.

Question 3

Are kei cars safe?

Accepted Answer

By modern standards, less safe than full-size cars. The small size limits structural crash space. Modern kei cars include airbags and modern safety features but are still smaller and lighter. For low-speed urban use, they are generally adequate. For highway driving in mixed traffic, they are more vulnerable.

Question 4

Why are kei trucks popular in the US?

Accepted Answer

Practical workhorses for farms, ranches, and properties. Kei trucks (Suzuki Carry, Daihatsu Hijet, Honda Acty) are small enough to navigate tight spaces, capable of reasonable load capacity for their size, and inexpensive to import and maintain. They are often used as off-highway utility vehicles rather than registered for road use.

Question 5

What is the most powerful kei sports car?

Accepted Answer

Modified kei cars can produce significant power. The factory limit is 64 horsepower (a gentleman agreement among Japanese manufacturers, not regulatory). Heavily modified kei sports cars (especially Cappuccino and Beat builds) can exceed 200 horsepower with larger turbos and supporting modifications, though doing so removes the kei classification.

Kei car

Related terms

Frequently asked questions