1978 Honda Cb400n — MOT History by Age
How cars manufactured in 1978 perform at MOT as they age
48 years
Current Age
58.1%
Latest Pass Rate
31
Total Tests (All Years)
32,317 mi
Avg Mileage (Latest)
Data from official DVSA MOT testing records
Insufficient data for same-age comparison.
How This Car Ages
📉
Insufficient data for this analysis
Pass Rate Trend
📊
Insufficient data for this analysis
Year-by-Year MOT Results
2009High Fail Rate
58.1%
Age (yrs) 31Tests 31Avg Mileage 32,317Top Failure Motorcycle lighting and signalling — 29.0%
Common MOT Failures
Top failure categories across all test years for 1978 Honda Cb400n, with age trends.
Motorcycle lighting and signalling
29.0%
— Consistent
Motorcycle steering and suspension
19.4%
— Consistent
Motorcycle brakes
12.9%
— Consistent
Motorcycle drive system
9.7%
— Consistent
Motorcycle tyres and wheels
9.7%
— Consistent
How Failures Change With Age
Comparing failure rates between the youngest and oldest test years.
| Category | At Youngest | At Oldest | Change | Trend |
|---|---|---|---|---|
| Motorcycle lighting and signalling | 29.0% (31 yrs) | 29.0% (31 yrs) | 0.0%
| ⚪ — |
| Motorcycle steering and suspension | 19.4% (31 yrs) | 19.4% (31 yrs) | 0.0%
| ⚪ — |
| Motorcycle brakes | 12.9% (31 yrs) | 12.9% (31 yrs) | 0.0%
| ⚪ — |
| Motorcycle drive system | 9.7% (31 yrs) | 9.7% (31 yrs) | 0.0%
| ⚪ — |
| Motorcycle tyres and wheels | 9.7% (31 yrs) | 9.7% (31 yrs) | 0.0%
| ⚪ — |
Other Manufacture Years
Looking for the best year to buy? See the full comparison on the Honda Cb400n page →
About This Data
This page shows how Honda Cb400n cars manufactured in 1978 perform at MOT as they age. Data spans from 2009 to 2009, covering 31 tests. Pass rates naturally decline with age as components wear.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.