YAMAHA DT125R SM
Pass rate over time
The DT125R SM's first-time pass rate has risen 5.7 points since 2010, 73.2% to 78.9%.
Pass rate by mileage
A low-mileage DT125R SM passes first time 71.7% of the time; by 20k that's 66.2%.
First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.
What fails on a DT125R SM
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| lighting and signalling |
|
43 | 25.1 |
| steering and suspension |
|
29 | 17 |
| brakes |
|
28 | 16.4 |
| lamps and reflectors |
|
20 | 11.7 |
| tyres and wheels |
|
11 | 6.4 |
| suspension |
|
10 | 5.8 |
| drive system |
|
10 | 5.8 |
| structure and attachments |
|
9 | 5.3 |
| reg plates and vin |
|
7 | 4.1 |
| steering |
|
4 | 2.3 |
Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.
How rivals compare
On first-time pass rate the DT125R SM beats 0 of its 4 closest rivals (YAMAHA YBR 125, HONDA CG125, HONDA CBF125).
Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the DT125R SM.
Pass rate by registration year
Best year to buy used: 2006 (73.1% pass). Weakest: 2005 (67.6%).
First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.