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 SX1's first-time pass rate has risen 10.1 points since 2011, 63.2% to 73.3%.
What fails on a SX1
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| lighting and signalling |
|
129 | 29.6 | 3.2× |
| brakes |
|
113 | 25.9 | 3.2× |
| steering and suspension |
|
79 | 18.1 | 3.6× |
| body and structure |
|
25 | 5.7 | 9.0× |
| lamps and reflectors |
|
24 | 5.5 | 1.3× |
| tyres and wheels |
|
21 | 4.8 | 1.6× |
| fuel and exhaust |
|
17 | 3.9 | 4.0× |
| structure and attachments |
|
14 | 3.2 | 2.2× |
| suspension |
|
8 | 1.8 | 1.5× |
| Items Not Tested |
|
6 | 1.4 | 8.2× |
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 SX1 beats 0 of its 4 closest rivals (PEUGEOT SPEEDFIGHT, PIAGGIO ZIP, PIAGGIO NRG).
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 SX1.
Compare with any bike
More SACHS models
Pass rate by registration year
Best year to buy used: 2009 (68.8% pass). Weakest: 2008 (62.0%).
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.
SACHS SX1 FAQ
Is the SACHS SX1 reliable?
The SACHS SX1 is less reliable than average for its class: 63.0% of its 530 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #5111 of 5428 models.
What does a SX1 fail its MOT on most?
lighting and signalling — 30% of all defects recorded against failed SX1 tests.
Embed this bike
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