MZ TS250/1: MOT pass rate by registration year

Which TS250/1 years pass first time, and which fall short of the model's 87.4% average, from 890 DVSA tests.

1979

highest-passing year · 90.7%

1978

lowest-passing year · 82.6%

8.1pp

spread across 5 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: 1979 (90.7% of 216 tests). Lowest: 1978 (82.6% of 115). Years more than two points below the model average: 1977, 1978, 1981.

Registered	Tests	First-time pass	vs model (87.4%)
1977	194	84.5%	-2.9 pp
1978	115	82.6%	-4.8 pp
1979	216	90.7%	+3.3 pp
1980	159	89.3%	+1.9 pp
1981	56	83.9%	-3.5 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 · 2006–2018

Questions

Which TS250/1 years have the lowest MOT pass rate?: 1977, 1978, 1981 registered examples pass first time less often than the MZ TS250/1 overall (87.4%); the 1978 cohort is lowest at 82.6% from 115 tests.
Which TS250/1 year has the highest MOT pass rate?: 1979, at 90.7% of 216 first tests (2005–2025).
How much does the TS250/1 pass rate vary by year?: 8.1 percentage points between the highest (1979, 90.7%) and lowest (1978, 82.6%) 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: MZ TS250/1 reliability, failures and mileage · ranked #1787 of 5428 models· other MZ models: Baghira, ETZ250, Skorpion, ETZ251, TS250, ETZ125