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Keitoreg Report

South Dakota

Restricted

What to review first: South Dakota can title an imported mini truck — but as an ATV with a motorcycle plate and no interstate access, not as an ordinary truck. Read the DOR Procedures Manual's Mini Trucks section before you assume a Tacoma-style plate is on the table.

South Dakota is not a hard ban, and it's not a truck-plate state either. The DOR Procedures Manual (dated August 30, 2016 and still the published, controlling procedure) routes an imported mini truck through the Unconventional Motor Vehicles chapter's Mini Trucks section: the vehicle is titled as an ATV, plated as a motorcycle, and — like every licensed unconventional vehicle — barred from interstate operation. A separate Four-Wheel ATV provision lets a combustion vehicle at or above 200 cc be licensed as a motorcycle for public highway use; a typical ~660 cc kei clears that floor easily. The state's own Off-Road Vehicles (ORV) page complicates the picture, saying ORVs "may not be registered and licensed for highway use but must be titled" — a buyer needs their county treasurer to confirm which procedure actually governs before paying for anything.

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Checks at a glance

ATV titling under Mini Trucks procedure

Needs review

The DOR Procedures Manual's Mini Trucks section is still published, but county treasurer familiarity and practice can vary — confirm by name and date before you buy.

Motorcycle plate (not a truck plate)

Clear

The Mini Trucks path issues a motorcycle plate, not an ordinary passenger or truck plate — set expectations accordingly.

Interstate highway operation

Blocked

The Procedures Manual bars a licensed unconventional vehicle from interstate operation, full stop.

Displacement floor for motorcycle licensing

Clear

The Four-Wheel ATV section allows combustion vehicles at or above 200 cc to be licensed as a motorcycle for public highway use — a typical ~660 cc kei clears this.

ORV-page vs. Mini Trucks-procedure tension

Needs review

The DOR's Off-Road Vehicles page says ORVs may not be licensed for highway use, which reads in tension with the Mini Trucks motorcycle-plate path — get your county treasurer to say which one applies to your vehicle.

Ordinary truck plate / title

Blocked

Not the path this procedure offers — do not buy expecting a standard truck title and plate.

Plain-English why

Road use

Once titled as an ATV and plated as a motorcycle under the Mini Trucks procedure, the vehicle is subject to ordinary equipment and traffic rules on highways — but it may not be operated on the interstate highway system under any circumstance. This restriction is stated plainly in the DOR Procedures Manual and applies to every licensed unconventional vehicle, not just mini trucks specifically.

Titling & registration

Title and registration happen at the county treasurer's office under the DOR Procedures Manual's Mini Trucks section (part of the Unconventional Motor Vehicles chapter, dated August 30, 2016 and still published as of this report's verify date). The vehicle is titled as an ATV, a Four-Wheel ATV affidavit (Form 1015) is completed, motor vehicle excise tax and fees are paid, and a motorcycle plate is issued. County treasurer familiarity with this specific procedure for an imported Japanese kei truck is not uniform — confirming with your own office, by name and date, before you commit money is worth the phone call.

It's an ATV title with a motorcycle plate — not a truck plate

Reveal findings

Reveal

It's an ATV title with a motorcycle plate — not a truck plate

The controlling procedure titles the vehicle as an ATV and issues a motorcycle plate. A seller or buyer expecting a standard truck title and plate, the way a Tacoma would be registered, is describing a different process than the one that actually applies.

!

Reveal

No interstate, ever, on this path

The DOR Procedures Manual bars a licensed unconventional vehicle from interstate operation outright. This isn't a gray area to negotiate at the counter — plan your routes assuming interstate miles are off the table.

RevealA typical kei clears the displacement floor easily. The Four-Wheel ATV section allows a combustion vehicle at or above 200 cc to be licensed as a motorcycle for public highway use. A stock kei at roughly 660 cc clears this floor with room to spare — displacement is not the obstacle here.

Reveal

The state's own pages disagree with each other

The Off-Road Vehicles page says ORVs "may not be registered and licensed for highway use but must be titled," which sits in tension with the Mini Trucks procedure's motorcycle-plate path. Don't assume either page alone settles it — ask your county treasurer which procedure they actually follow for an imported mini truck.

!

Reveal

"The 2016 manual is obsolete" is not a legal argument

The Procedures Manual is dated August 30, 2016, but it remains the published, controlling DOR procedure as of this report's verify date. Treat it as current unless your county treasurer points to a newer primary source that supersedes it.

RevealSecondary blogs calling South Dakota "legal" skip the ATV caveat. Posts that describe South Dakota as simply "kei-legal" without mentioning the ATV title, motorcycle plate, and no-interstate restriction are describing a friendlier process than the one that actually exists.

Buy / don't-buy checklist

Proceed if

  • ✓You accept an ATV title with a motorcycle plate — not an ordinary passenger or truck plate.
  • ✓Interstate highway access is not part of your intended use.
  • ✓You can assemble the named import documents (export certificate, bill of lading, CBP entry paperwork).
  • ✓Your county treasurer confirms, by name and date, that the Mini Trucks procedure — or an equivalent written path — is still live at their office.

Walk away if

  • ✗You need an ordinary truck title and plate — this procedure doesn't offer one.
  • ✗Your intended use includes interstate highway driving.
  • ✗Your county treasurer says there's no on-road plate available for an ORV/ATV-class import at their office.
  • ✗A seller claims South Dakota titles kei trucks as trucks — that's not the controlling procedure.

Document checklist

  • Green Export Certificate — Establishes ownership and origin abroad.
  • Combined Transport Bill of Lading — Part of the import documentation trail the county treasurer will expect.
  • CBP Entry / Immediate Delivery documentation — Include English translations where the original documents aren't in English.
  • Form 1015 — Four-Wheel ATV affidavit — The affidavit that supports licensing the vehicle as a motorcycle for public highway use.

Federal baseline — applies in every state

CBP entry ≠ plates
A CBP Form 7501 entry summary and Customs clearance prove the vehicle lawfully entered the country. Neither certifies FMVSS or EPA compliance, and neither obligates any state to title or register the vehicle.
HS-7 Box 1 vs. Box 8
NHTSA's HS-7 declaration: Box 1 claims the 25-year-or-older FMVSS exemption. Box 8 claims the vehicle was never manufactured primarily for public roads. Box 8 can help clear Customs, but it's also the paper trail states point to when refusing plates.
EPA ~21-year vs. NHTSA ~25-year clock mismatch
EPA's age exclusion (Form 3520-1, code E) applies at 21 years from manufacture; NHTSA's FMVSS exemption requires 25 years. A truck can clear one agency's age rule and fail the other's — and clearing both still doesn't create a state registration right.
AAMVA is advisory, not federal law
AAMVA's Regulation of Off-Road Vehicles Best Practices names "mini trucks (including those over 25 years old)" and recommends states refuse highway registration without factory FMVSS/EPA labels, regardless of age. It's a state-DMV trade-association recommendation — but it's the playbook many states follow.

Ordered steps

  1. 1Read the DOR Procedures Manual's Mini Trucks section (Unconventional Motor Vehicles chapter) before you shop.
  2. 2Call your county treasurer and DOR Motor Vehicle (605-773-3541) and ask, by name: does your office still title an imported mini truck as an ATV with a motorcycle plate under this procedure? Get a name and date.
  3. 3Assemble the Green Export Certificate, Combined Transport Bill of Lading, and CBP Entry/Immediate Delivery documentation.
  4. 4Apply for an ATV title at the county treasurer's office; complete Form 1015 (the Four-Wheel ATV affidavit).
  5. 5Pay motor vehicle excise tax and applicable fees.
  6. 6Receive your motorcycle plate; confirm your county treasurer's read on the ORV-page tension before you rely on it.
  7. 7Plan routes around the no-interstate restriction before you buy, not after.

Common failure points

  • A county treasurer unfamiliar with the Mini Trucks procedure for an imported Japanese kei truck — bring a printed copy of the DOR Procedures Manual's Mini Trucks section.
  • Assuming the ATV title and motorcycle plate is a stepping stone to an ordinary truck plate — it isn't; this is the final classification, not an interim one.
  • Treating the ORV page and the Mini Trucks procedure as interchangeable without asking the treasurer which one applies.
  • Planning a route that requires interstate miles — a hard restriction under this procedure regardless of plate type.
  • Relying on a secondary blog's "South Dakota is legal" claim instead of confirming the ATV/motorcycle-plate structure directly with your county.

Sources

SourceLabel
DOR Procedures Manual (Mini Trucks / Unconventional Motor Vehicles)

Accessed 2026-09-28

Primary source
SD DOR — Off-Road Vehicles

Accessed 2026-09-28

Primary source
SD DOR — Dealer Manual, May 2025

Accessed 2026-09-28

Primary source
Oglala Lakota County — Import Vehicle Requirements

Accessed 2026-09-28

Verify with DMV
SD DOR — Low-Speed Vehicles

Accessed 2026-09-28

Primary source

Last verified 2026-10-11

Frequently asked questions

Is a kei truck legal in South Dakota?

In a restricted sense — the DOR Procedures Manual's Mini Trucks section titles an imported mini truck as an ATV with a motorcycle plate, not as an ordinary truck.

Can a kei truck titled in South Dakota drive on the interstate?

No. The DOR Procedures Manual bars a licensed unconventional vehicle from interstate operation, regardless of plate type.

Will a typical kei truck's engine size be a problem in South Dakota?

Usually not. The Four-Wheel ATV section allows a combustion vehicle at or above 200 cc to be licensed as a motorcycle for public highway use, and a stock kei at roughly 660 cc clears that floor.

Does South Dakota's Off-Road Vehicles page conflict with the Mini Trucks procedure?

It can read that way — the ORV page says off-road vehicles may not be licensed for highway use, while the Mini Trucks procedure issues a motorcycle plate. Confirm with your county treasurer which one applies to your vehicle.

SAMPLE — this page illustrates full decision depth and does not reflect a specific vehicle.

Not legal advice. Keitoreg is not affiliated with any DMV or federal agency. Rules change — always verify with your state DMV or county tax assessor before purchasing or importing.

Status labels are informational estimates based on publicly available sources as of the last-verified date above.

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