Pass rate over time
The C90's first-time pass rate has risen 10.8 points since 2005, 77.6% to 88.4%.
Pass rate by mileage
A low-mileage C90 passes first time 85.7% of the time; by 50k that's 71.2%.
First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.
What fails on a C90
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| lighting and signalling |
|
10,072 | 31.2 | 1.5× |
| steering and suspension |
|
6,579 | 20.4 | 1.6× |
| tyres and wheels |
|
4,941 | 15.3 | 2.1× |
| brakes |
|
4,869 | 15.1 | 0.9× |
| drive system |
|
1,670 | 5.2 | 2.0× |
| body and structure |
|
1,404 | 4.4 | 2.6× |
| lamps and reflectors |
|
1,155 | 3.6 | 0.4× |
| fuel and exhaust |
|
820 | 2.5 | 1.1× |
| structure and attachments |
|
391 | 1.2 | 0.5× |
| suspension |
|
362 | 1.1 | 0.4× |
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 C90 beats 3 of its 4 closest rivals (HONDA SCV100, YAMAHA YQ100, HONDA NHX 110 WH-8).
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 C90.
Pass rate by registration year
Best year to buy used: 1969 (89.1% pass). Weakest: 1972 (75.0%).
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.
HONDA C90 FAQ
Is the HONDA C90 reliable?
The HONDA C90 is more reliable than average for its class: 79.3% of its 92,772 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #3719 of 5426 models.
What does a C90 fail its MOT on most?
lighting and signalling — 31% of all defects recorded against failed C90 tests.
What is the best year of C90 to buy used?
By first-time pass rate, 1969-registered examples do best (89.1%) and 1972 worst (75.0%). Condition and history still trump the year.
How many miles will a C90 last?
The median C90 shows 17,744 miles at test, and examples around 50k miles still pass 71.2% of the time — mileage alone rarely kills one.