Honda ST1100M: MOT pass rate by registration year

Which ST1100M years pass first time, and which fall short of the model's 79.8% average, from 3,539 DVSA tests.

1991

highest-passing year · 81.2%

1993

lowest-passing year · 79.0%

2.2pp

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: 1991 (81.2% of 893 tests). Lowest: 1993 (79.0% of 352).

Registered	Tests	First-time pass	vs model (79.8%)
1991	893	81.2%	+1.4 pp
1992	2,188	79.3%	-0.5 pp
1993	352	79.0%	-0.8 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 · 2005–2020

Questions

Which ST1100M years have the lowest MOT pass rate?: none: no registration year of the Honda ST1100M falls more than two points under the model's 79.8% overall pass rate.
Which ST1100M year has the highest MOT pass rate?: 1991, at 81.2% of 893 first tests (2005–2025).
How much does the ST1100M pass rate vary by year?: 2.2 percentage points between the highest (1991, 81.2%) and lowest (1993, 79.0%) 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 ST1100M reliability, failures and mileage · ranked #3628 of 5428 models· other Honda models: CBR600F, CBR900RR, CBR1100XX, CB500, C90, VFR800 Fi