WHITE KNUCKLE 125
The pass rate is the MOT first-time pass: a roadworthiness check of the items an MOT covers (brakes, lights, tyres, steering, structure, emissions), not a full mechanical inspection of engine or gearbox internals. It is a reliability signal, not a complete measure of mechanical reliability. What this measures.
“vs expected” adjusts for age, mileage and test class, so a cherished classic and a hard-used commuter are compared fairly. How this works.
Pass rate over time
The 125's first-time pass rate has risen 6.6 points since 2017, 51.3% to 57.9%.
What fails on a 125
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| lamps and reflectors |
|
387 | 30.3 | 13.0× |
| structure and attachments |
|
229 | 17.9 | 21.0× |
| brakes |
|
211 | 16.5 | 3.5× |
| suspension |
|
147 | 11.5 | 15.7× |
| steering |
|
85 | 6.7 | 16.9× |
| lighting and signalling |
|
82 | 6.4 | 1.2× |
| steering and suspension |
|
64 | 5 | 1.3× |
| tyres |
|
36 | 2.8 | 4.9× |
| drive system |
|
22 | 1.7 | 3.1× |
| Identification of the vehicle |
|
15 | 1.2 | 7.0× |
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 125 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 125.
Compare with any bike
More WHITE KNUCKLE models
Pass rate by registration year
Best year to buy used: 2012 (61.3% pass). Weakest: 2016 (47.4%).
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.
WHITE KNUCKLE 125 FAQ
Is the WHITE KNUCKLE 125 reliable?
The WHITE KNUCKLE 125 is less reliable than average for its class: 51.7% of its 924 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #5384 of 5428 models.
What does a 125 fail its MOT on most?
lamps and reflectors — 30% of all defects recorded against failed 125 tests.
What is the best year of 125 to buy used?
By first-time pass rate, 2012-registered examples do best (61.3%) and 2016 worst (47.4%). Condition and history still trump the year.
Embed this bike
Free to embed on your site, blog or forum — a live White Knuckle 125 reliability card that stays up to date and links back here. More on the free API page.