Honda CB400SF: MOT pass rate by registration year

Which CB400SF years pass first time, and which fall short of the model's 81.5% average, from 504 DVSA tests.

1994

highest-passing year · 87.1%

1992

lowest-passing year · 74.5%

12.6pp

spread across 3 years

Pass rate by registration year

first-time pass rate · cohorts with 50 or more tests · registration year from first use date

Highest pass rate: 1994 (87.1% of 93 tests). Lowest: 1992 (74.5% of 110). Years more than two points below the model average: 1992.

Registered	Tests	First-time pass	vs model (81.5%)
1992	110	74.5%	-7.0 pp
1993	123	79.7%	-1.8 pp
1994	93	87.1%	+5.6 pp

Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years. A first-time MOT pass is a roadworthiness check, not a full mechanical inspection.

Pass rate over time

first-time pass rate by test year · 2006–2012

Questions

Which CB400SF years have the lowest MOT pass rate?: 1992 registered examples pass first time less often than the Honda CB400SF overall (81.5%); the 1992 cohort is lowest at 74.5% from 110 tests.
Which CB400SF year has the highest MOT pass rate?: 1994, at 87.1% of 93 first tests (2005–2025).
How much does the CB400SF pass rate vary by year?: 12.6 percentage points between the highest (1994, 87.1%) and lowest (1992, 74.5%) cohorts with at least 50 tests. Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.

Full report: Honda CB400SF reliability, failures and mileage · ranked #3270 of 5428 models· other Honda models: CBR600F, CBR900RR, CBR1100XX, CB500, C90, VFR800 Fi