No. A car licence — Vietnamese or foreign — does not cover a 125 cc motorbike in Vietnam. The licence classes are separate by design: Article 57 of the Law on Road Traffic Order and Safety (No. 36/2024/QH15) defines car classes (B, C, D and the trailer classes) and motorbike classes (A1, A, B1) as distinct categories covering distinct vehicle types. Nothing in the car classes reaches two-wheeled machines.
What happens if you try
Riding a 125 cc scooter with only a car licence is treated by the fine schedule as not meeting licence conditions for that machine — the same band as having no licence at all: 2,000,000–4,000,000 VND for machines up to and including 125 cc, 6,000,000–8,000,000 VND above. The checkpoint does not average the two categories; it checks the licence against the machine in front of it.
Where the confusion comes from
Some countries fold light motorbikes into car licences, and visitors assume the same carry-over. Vietnam does not. The other common confusion is the exchange: a foreigner exchanging a licence receives Vietnamese classes matching the original — a car-only licence exchanges into car classes only, with no motorbike class appearing by accident.
What to do instead
Three routes exist. If you hold a foreign motorbike licence with three months of residence papers, exchange it. If you hold only a car licence, you sit the A1 test as anyone else does — the car licence neither helps nor blocks. If you are a tourist with no motorbike entitlement at all, you cannot legally ride a 125 cc rental in Vietnam, and no rental paperwork changes that.
The 125 cc question is the most common one at Hanoi rental counters, and the answer is always the class on the licence, not the engine size of the habit.
Information, not legal advice. Verified against Law 36/2024/QH15 and Decree 168/2024/NĐ-CP on 2026-09-22.