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Yamaha Aerox: 2T and 4T versions and what to check when buying used
Yamaha Aerox — a sporty scooter line that's been popular among young riders since 1997. We look at the versions, engines, and what to check when buying used.
Aerox in brief
The Aerox is a sporty scooter designed for city use and short distances. It's been in production since 1997 and has become one of Yamaha's most recognizable scooters, especially among young people.
The most common variant is the 50 cm³ (AM category), but larger versions are also sold worldwide. In the used market, it's crucial to check the engine condition and ensure the scooter hasn't been 'tuned'.
Versions — what's the difference
The classic Aerox features a 50 cm³ two-stroke engine with liquid cooling. It's lightweight and lively but requires more maintenance and uses a mix of oil and fuel.
Later, a four-stroke 50 cm³ version was introduced, which is quieter and more eco-friendly. Additionally, larger versions like 125 cm³ and 155 cm³ are available in some markets.
Engine and transmission
The main engine is a liquid-cooled, 49 cm³ displacement, two-stroke or four-stroke. The transmission is automatic, with a belt drive and variator.
Due to power restrictions (in the AM category), the scooter has a speed limit, but many have been 'tuned', so the actual power and speed often differ from factory settings.
What to check when buying a used Aerox
First, check whether the engine or exhaust system hasn't been tampered with. Increased power can lead to faster wear and tear, and illegal modifications can cause issues with road traffic regulations.
Inspect the variator, belt, brakes, and tyres. On two-stroke motorcycles, check for excessive smoke and ensure the oil delivery system is functioning correctly.
Look for signs of a drop: plastic, wings, branches. Check if the documents match the motorcycle's details.
Trim levels and versions
Names and equipment vary by market and year; we list the versions most commonly found in Europe.
Aerox 50 (2T)
From 1997The classic two-stroke variant.
- Two-stroke engine
- Liquid cooling
- Vibrant, but requires more maintenance
Aerox 50 (4T)
From around 2013The four-stroke, quieter version.
- Four-stroke engine
- Quieter and more eco-friendly
- Lower maintenance costs
Aerox R
various yearsA sportier version.
- Often — sporty trim.
- Often — more powerful brakes
- A more aggressive style
Aerox (didesnio tūrio)
depending on the marketVersions with a larger engine in some markets.
- A larger engine (125 or 155 cc)
- Requires the appropriate category
- Not always sold in Europe
Comparison of versions
| 50 cm³ (2T) | 50 cm³ (4T) | Didesnio tūrio | |
|---|---|---|---|
| Who it suits | For spirited, sporty driving | For calmer, more economical use | Often — for other markets |
| Engine | 49 cm³, two-stroke | 49 cm³, four-stroke | 125–155 cm³ (depending on the market) |
| Category | AM | AM | A1 or higher |
| Price in the used market (relatively) | € | €€ | €€ |
Most buyers will prefer the 4T version for its smoother operation and lower maintenance costs. Opt for the 2T if you want a sportier feel and don't mind extra maintenance.
Pros
- Sporty and recognizable design
- Lightweight and easy to handle
- Economical to run
- Wide range of parts and accessories available
Cons
- Many scooters are "tuned"
- Two-stroke versions require more maintenance
- Limited passenger comfort
Frequently asked questions
What category does the Aerox 50 fall into?
Usually the AM category. Check the specific age and rules according to your country's regulations.
Is it worth buying a "tuned" Aerox?
Only if you know exactly what modifications have been made and are sure they are legal. Illegal modifications can cause issues with road traffic regulations.
How do the 2T and 4T Aerox differ?
The 2T engine is more lively and simpler, but noisier and requires more maintenance. The 4T is quieter, more eco-friendly and less demanding.
Updated 2026-10-21 · Trim levels and equipment vary by market and model year — check the equipment of the specific car. · Translated automatically
