Yamaha NVX 155: Licence Class Thresholds, Power Figures and Size From Yamaha and Government Pages

Anyone looking at a Yamaha NVX 155 rental has two questions the official pages can help with: where a 155 cc engine falls against the licence class thresholds, and what the bike’s power figures are. Yamaha Motor Vietnam’s NVX 155 VVA ABS page lists 155.1 cc and a maximum of 15.4 PS. Two pages on Vietnamese government domains give the same class thresholds, one of them tied to the 2024 road traffic law: up to 125 cm3 for class A1 and above that for class A. This article reads those pages and a press comparison of the 2022 model, attributes each figure and lists where they differ. None of the pages covers rentals or says who should pick this bike.

Licence class thresholds for two-wheel motorcycles

A Nghe An commune portal page dated 19 May 2026 summarises the 2024 Law on Road Traffic Order and Safety (Luật Trật tự, an toàn giao thông đường bộ), in force from 1 January 2025, and tabulates the classes. A page on the Ministry of Public Security’s bocongan.gov.vn domain, dated 5 March 2025 and crediting the Báo CAND newspaper, gives the same A1 and A thresholds while reporting on Circular 12/2025 on driving tests. The Nghe An page adds that the 2024 law raises the number of licence classes from 13 to 15 and changes which vehicles each class covers, and the Public Security page gives the earlier class A1 limit as up to 175 cm3 and class A2 as above 175 cm3, where the Nghe An table reads 50 cm3 to below 175 cm3 and 175 cm3 and above.

Where 155.1 cc falls against the thresholds

Yamaha lists the NVX 155 VVA ABS at 155.1 cc. That exceeds the 125 cm3 limit for a Vietnamese A1 licence issued under the scheme that took effect on 1 January 2025; Article 57 places two-wheel motorcycles above 125 cm3 in class A. The actual version and registered displacement still need checking at handover.

Older Vietnamese licences have transition rules. Article 89(1) and (2)(a) of the official consolidated road traffic safety law, checked on 26 October 2026, keeps licences issued before 1 January 2025 usable for their stated validity. An older A1 that has not been exchanged or reissued continues to cover two-wheel petrol motorcycles from 50 cm3 to below 175 cm3. The 155.1 cc figure falls within that engine band, subject to the licence remaining valid and the other legal conditions. Under Article 89(3)(a), exchanging or reissuing that older A1 leads to class A restricted to below 175 cm3 or electric power below 14 kW.

Check the issue date, any exchange or restriction and the actual bike, rather than deciding from the letters A1 alone. See Vietnamese A1 and A licence classes. Foreign-issued licences and International Driving Permits need a separate recognition check; the domestic transition rule does not establish that a visitor’s documents are accepted.

Power and torque on Yamaha’s page

The page describes a single-cylinder, four-stroke, four-valve, liquid-cooled Blue Core engine with a variable valve (VVA) system, which Yamaha says gives smooth acceleration.

Yamaha adds that the 5.5 L tank gives a range of up to 200 km per fill. VietNamNet’s comparison of the 2022 model gives the same 15.4 PS, with 14.987 horsepower in brackets, and 13.9 Nm at 6,500 rpm; Yamaha’s page gives the power only as 11.3 kW and 15.4 PS. No page read gives a top speed, an acceleration time or the conditions behind the 2.19 L/100 km figure.

Size, weight and seat height

The page lists 1,980 x 700 x 1,150 mm, a wheelbase of 1,350 mm, ground clearance of 145 mm, a seat height of 790 mm and a wet weight of 125 kg. Tyres are 110/80-14 at the front and 140/70-14 at the rear, both tubeless, with a 230 mm hydraulic front disc brake with ABS and a 130 mm rear drum brake. VietNamNet gives the same dimensions, wheelbase and seat height, describes the NVX as taller and bulkier than the Honda Air Blade 160, and lists that rival’s seat at 775 mm and weight at about 114 kg. For matching a bike to a rider, see Motorbike Rental Hanoi: How to Choose the Right Bike; the figures above do not say which rider suits a 790 mm seat. Yamaha describes the two-level seat as comfortable for the rider and a passenger and gives no seat padding or width figures.

Fuel, storage and equipment

Yamaha lists 25 L of under-seat storage with a phone charging port inside the compartment, and a fuel cap placed on the outside for easier filling. It also lists an LCD instrument panel and the Y-Connect phone link, which shows call, email and message notices, maintenance advice, fuel use and parking location. Other listed items are SmartKey, a Stop & Start System that cuts the engine at a stop and restarts it, front-wheel ABS, LED lighting and a rear oil-damped suspension. The warranty is 3 years or 30,000 km, whichever comes first.

What the press comparison adds

VietNamNet’s comparison covers the 2022 NVX 155, and its extract carries no date. It reports 25 L of storage against 23.2 L for the Air Blade 160. Its conclusion says the Honda has more engine choices, while the Yamaha has more modern equipment, a larger storage box and lower fuel use. Those are the report’s judgements, not measurements. For a broader view of scooters in the city, see Hanoi Scooter Rental: Complete Guide for Travelers.

Where the sources differ

Yamaha’s page gives a wet weight of 125 kg, while VietNamNet gives 129 kg. Yamaha’s page lists several NVX 155 versions (the sport SP 2025, the GP 2025 and the standard 2025 alongside this VVA ABS one), and the specification table read belongs to the VVA ABS page only; VietNamNet covers the 2022 model, so figures for other versions or years may differ. The licence bands differ between the two schemes in the table above, and the Nghe An page, dated 19 May 2026, summarises rules from 2025 and does not mention later amendments.

What the pages leave out

No page gives rental terms, deposits, damage rules or what an operator supplies, and none says who should choose the NVX. Yamaha’s page shows a suggested retail price for buyers, which says nothing about rental charges and is not used here. None states which class a rider needs for this model, whether foreign-issued or international driving licences are accepted, or how a shop verifies a licence. None gives a top speed or real-world fuel use. A separate article, titled Scooter Rental Hanoi: How to Check the Bike First – Complete Pre-Rental Inspection Guide, covers checking a bike before renting it.

Sources checked

• Yamaha Motor Vietnam: NVX 155 VVA ABS page
• Bach Ngoc commune portal, Nghe An: 2025 traffic rules, 19 May 2026
• bocongan.gov.vn (Ministry of Public Security domain): driving test rules, 5 March 2025
• VietNamNet: NVX 155 and Air Blade 160 comparison

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