SKYTEAM ST 90
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.
What fails on a ST 90
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| steering and suspension |
|
35 | 36.5 |
| lighting and signalling |
|
22 | 22.9 |
| reg plates and vin |
|
11 | 11.5 |
| brakes |
|
8 | 8.3 |
| drive system |
|
6 | 6.2 |
| body and structure |
|
5 | 5.2 |
| tyres and wheels |
|
3 | 3.1 |
| lamps and reflectors |
|
2 | 2.1 |
| Items Not Tested |
|
2 | 2.1 |
| driving controls |
|
2 | 2.1 |
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 ST 90 beats 2 of its 4 closest rivals (HONDA C90, HONDA SCV100, YAMAHA YQ100).
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 ST 90.
Compare with any bike
More SKYTEAM models
Pass rate by registration year
Best year to buy used: 2006 (71.2% pass). Weakest: 2006 (71.2%).
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.
Embed this bike
Free to embed on your site, blog or forum — a live Skyteam ST 90 reliability card that stays up to date and links back here. More on the free API page.