Lambretta GP225: MOT pass rate by registration year

Which GP225 years pass first time, and which fall short of the model's 87.6% average, from 627 DVSA tests.

1969

highest-passing year · 91.8%

1970

lowest-passing year · 83.3%

8.5pp

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: 1969 (91.8% of 85 tests). Lowest: 1970 (83.3% of 108). Years more than two points below the model average: 1970, 1971.

Registered	Tests	First-time pass	vs model (87.6%)
1969	85	91.8%	+4.2 pp
1970	108	83.3%	-4.3 pp
1971	140	85.0%	-2.6 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 · 2006–2017

Questions

Which GP225 years have the lowest MOT pass rate?: 1970, 1971 registered examples pass first time less often than the Lambretta GP225 overall (87.6%); the 1970 cohort is lowest at 83.3% from 108 tests.
Which GP225 year has the highest MOT pass rate?: 1969, at 91.8% of 85 first tests (2005–2025).
How much does the GP225 pass rate vary by year?: 8.5 percentage points between the highest (1969, 91.8%) and lowest (1970, 83.3%) 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: Lambretta GP225 reliability, failures and mileage · ranked #1725 of 5428 models· other Lambretta models: LI125, GP200, LI150, GP150, GP125, Li