SUPERBYKE RBP 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 RBP 125's first-time pass rate has fallen 9.8 points since 2010, 49.2% to 39.4%.
What fails on a RBP 125
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| lighting and signalling |
|
295 | 35.5 |
| steering and suspension |
|
169 | 20.3 |
| brakes |
|
115 | 13.8 |
| tyres and wheels |
|
83 | 10 |
| drive system |
|
66 | 7.9 |
| body and structure |
|
55 | 6.6 |
| fuel and exhaust |
|
22 | 2.6 |
| driving controls |
|
10 | 1.2 |
| lamps and reflectors |
|
8 | 1 |
| structure and attachments |
|
8 | 1 |
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 RBP 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 RBP 125.
Compare with any bike
More SUPERBYKE models
Pass rate by registration year
Best year to buy used: 2008 (47.4% pass). Weakest: 2006 (37.1%).
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.
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