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Yamaha DT 125: generations, engines, and what to check when buying
The Yamaha DT 125 is one of the most popular lightweight 125 cm³ enduro motorcycles, produced from 1974 to 2006. We look at the main generations, engines, and what to check when buying used.
DT 125 in brief
The DT 125 is a lightweight two-stroke enduro motorcycle that many people loved as their first big bike in their youth. It's cheap to run, lightweight, and suits both road and light off-road use.
Today, the DT 125 is often found as an older motorcycle, so most examples have had more than one owner. The key is the technical condition and whether the vehicle has clean paperwork.
Generations — what's the difference
The first DT 125 appeared in 1974 with an air-cooled two-stroke engine. Later, in 1982, the DT 125 LC arrived with a liquid-cooled engine, and in 1988, the DT 125 R, which was produced until the early 2000s and is one of the most common.
In the mid-2000s, Yamaha offered the DT 125 RE (enduro) and DT 125 X (supermoto). The newer the generation, the more it's tailored to modern requirements and daily use.
Engines and transmission
All DT 125s have a single-cylinder two-stroke 125 cm³ engine and a manual gearbox. In Europe, earlier versions were often restricted to around 15 hp (11 kW) to meet 125 cm³ class limits.
The design remains simple: minimal electronics, an easily accessible and serviceable engine. Due to the two-stroke operating principle, the engine needs regular maintenance and the right oil.
What to check when buying a used DT 125
For a two-stroke engine, the condition of the cylinder and piston is crucial: find out when the piston or piston rings were last replaced, and ensure the engine starts easily and doesn't misfire. Check that the exhaust system isn't leaking and the engine isn't smoking excessively.
Inspect the frame, rear subframe, and other mounts — enduro motorcycles often ride off-road, so look for cracks or welds. Check the condition of the rear shock, front fork seals, and chain, as well as the documents and engine number.
Versions and trims
DT 125 names and equipment vary by year of manufacture; here we describe the main versions.
DT 125 (ankstyvasis)
1974–1981Air-cooled first-generation enduro motorcycle.
- Air-cooled two-stroke engine
- Simple design
- Often — classic looks and collector's value
DT 125 LC
From 1982Liquid-cooled version with more power.
- Liquid-cooled engine
- Improved suspension
- Suitable for both road and off-road use
DT 125 R
1988–2000 early yearsThe most common generation on the used market.
- Liquid-cooled two-stroke engine
- Lightweight enduro design
- Often — restricted power for younger riders
DT 125 RE / X
Mid-2000sLatest DT 125 versions — enduro and supermoto.
- RE — for off-road riding
- X — supermoto style variant
- More modern look
DT 125 generation comparison
| DT 125 LC | DT 125 R | DT 125 RE / X | |
|---|---|---|---|
| Who it's for | For enthusiasts and collectors | First motorcycle and daily use | First motorcycle, off-road or supermoto |
| Cooling | Liquids | Liquids | Liquids |
| Engine | Two-stroke, 125 cm³ | Two-stroke, 125 cm³ | Two-stroke, 125 cm³ |
| Age | Oldest | Mid-range | Newest |
| Price in the used market (relatively) | € | € | €€ |
If you're after a cheap, light, and simple enduro, opt for a better-conditioned DT 125 R or a newer version. Before buying, make sure to inspect the engine and frame thoroughly.
Pros
- Light and simple
- Low maintenance and parts costs, most of which can be repaired independently
- Suitable for both road and light off-roading
- Popular model with plenty of information and fans
Cons
- Two-stroke engines require more maintenance and oil
- Most examples are now old and have plenty of miles
- Not as comfortable for long journeys as larger motorcycles
Frequently asked questions
What category is needed for a DT 125?
125 cm³ and up to 11 kW power motorcycles usually fall under the A1 category. Check your documents and current regulations for the exact category.
Is the DT 125 suitable for a beginner?
Yes, the DT 125 is light and straightforward, making it often recommended as a first motorcycle. Just ensure it's in good mechanical condition.
Which generation of DT 125 is best used?
Most will find the DT 125 R or later versions suitable — there are more of them, and parts and information are easier to find. Earlier models are more prized by collectors.
Updated 2026-10-21 · Trim levels and equipment vary by market and model year — check the equipment of the specific car. · Translated automatically
