HONDA CB400T

398cc Petrol Class 2

#2362 of 5426 overall #338 of 921 HONDAs #103 of 205 naked bikes

85.5%

first-time pass rate

7.4%

failed outright

27,360

median miles at test

365

MOT tests, 2005–2025

Pass rate by mileage

how the CB400T's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage CB400T passes first time 88.2% of the time; by 40k that's 80.5%.

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 CB400T

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	21	33.9
steering and suspension	16	25.8
brakes	9	14.5
drive system	5	8.1
tyres and wheels	4	6.5
fuel and exhaust	3	4.8
structure and attachments	2	3.2
sidecar	1	1.6
body and structure	1	1.6

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the CB400T beats 3 of its 3 closest rivals (HONDA CB500, HONDA CB400, HONDA CB400N).

HONDA CB500 83.3% pass · 105k tests HONDA CB400 80.9% pass · 9,072 tests HONDA CB400N 77.5% pass · 5,366 tests

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 CB400T.

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Best year to buy used: 1977 (86.4% pass). Weakest: 1978 (83.6%).

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.