BETTER BT 125-20
Pass rate over time
The BT 125-20's first-time pass rate has fallen 17.1 points since 2008, 65.9% to 48.8%.
What fails on a BT 125-20
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| lighting and signalling |
|
360 | 34.7 | 4.5× |
| steering and suspension |
|
214 | 20.6 | 4.4× |
| brakes |
|
147 | 14.2 | 2.6× |
| body and structure |
|
93 | 9 | 13.2× |
| drive system |
|
75 | 7.2 | 8.1× |
| tyres and wheels |
|
69 | 6.6 | 3.3× |
| fuel and exhaust |
|
29 | 2.8 | 3.5× |
| lamps and reflectors |
|
25 | 2.4 | 0.8× |
| structure and attachments |
|
14 | 1.3 | 1.2× |
| reg plates and vin |
|
12 | 1.2 | 1.4× |
Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.
How rivals compare
On first-time pass rate the BT 125-20 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 BT 125-20.
Pass rate by registration year
Best year to buy used: 2005 (58.4% pass). Weakest: 2006 (53.7%).
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.
BETTER BT 125-20 FAQ
Is the BETTER BT 125-20 reliable?
The BETTER BT 125-20 is less reliable than average for its class: 55.3% of its 976 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #5333 of 5426 models.
What does a BT 125-20 fail its MOT on most?
lighting and signalling — 35% of all defects recorded against failed BT 125-20 tests.