BIKERELIABILITY Reg check
Registration-year report · 2005–2025

Data as of: DVSA MOT results to 2025

Lambretta Li: MOT pass rate by registration year

Which Li years pass first time, and which fall short of the model's 87.7% average, from 8,752 DVSA tests.

1970
highest-passing year · 92.4%
1972
lowest-passing year · 84.1%
8.3pp
spread across 19 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: 1970 (92.4% of 66 tests). Lowest: 1972 (84.1% of 82). Years more than two points below the model average: 1965, 1971, 1972, 1973, 1979.

82%88%94%1959: 88.8% pass (294 tests)1960: 89.1% pass (753 tests)1961: 89.3% pass (638 tests)1962: 86.7% pass (1,005 tests)1963: 88.6% pass (984 tests)1964: 89.4% pass (1,090 tests)1965: 85.4% pass (1,019 tests)1966: 87.8% pass (933 tests)1967: 86.6% pass (464 tests)1968: 87.7% pass (252 tests)1969: 89.2% pass (93 tests)1970: 92.4% pass (66 tests)1971: 85.3% pass (197 tests)1972: 84.1% pass (82 tests)1973: 84.6% pass (52 tests)1977: 91.5% pass (59 tests)1978: 89.3% pass (75 tests)1979: 84.7% pass (59 tests)1982: 89.5% pass (76 tests)195919681982
RegisteredTestsFirst-time passvs model (87.7%)
1959 294 88.8% +1.1 pp
1960 753 89.1% +1.4 pp
1961 638 89.3% +1.6 pp
1962 1,005 86.7% -1.0 pp
1963 984 88.6% +0.9 pp
1964 1,090 89.4% +1.7 pp
1965 1,019 85.4% -2.3 pp
1966 933 87.8% +0.1 pp
1967 464 86.6% -1.1 pp
1968 252 87.7% +0.0 pp
1969 93 89.2% +1.5 pp
1970 66 92.4% +4.7 pp
1971 197 85.3% -2.4 pp
1972 82 84.1% -3.6 pp
1973 52 84.6% -3.1 pp
1977 59 91.5% +3.8 pp
1978 75 89.3% +1.6 pp
1979 59 84.7% -3.0 pp
1982 76 89.5% +1.8 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 · 2005–2023
80%90%100%2005: 85.3% pass (68 tests)2006: 83.8% pass (526 tests)2007: 87.3% pass (526 tests)2008: 87.2% pass (572 tests)2009: 85.3% pass (631 tests)2010: 84.0% pass (655 tests)2011: 87.5% pass (688 tests)2012: 87.1% pass (708 tests)2013: 86.5% pass (763 tests)2014: 87.6% pass (769 tests)2015: 88.8% pass (762 tests)2016: 88.9% pass (722 tests)2017: 91.9% pass (680 tests)2018: 93.0% pass (270 tests)2019: 86.6% pass (127 tests)2020: 95.3% pass (64 tests)2021: 96.9% pass (64 tests)2022: 100.0% pass (58 tests)2023: 90.9% pass (44 tests)20052023

Questions

Which Li years have the lowest MOT pass rate?
1965, 1971, 1972, 1973, 1979 registered examples pass first time less often than the Lambretta Li overall (87.7%); the 1972 cohort is lowest at 84.1% from 82 tests.
Which Li year has the highest MOT pass rate?
1970, at 92.4% of 66 first tests (2005–2025). Years more than two points above the model average: 1970, 1977.
How much does the Li pass rate vary by year?
8.3 percentage points between the highest (1970, 92.4%) and lowest (1972, 84.1%) 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 Li reliability, failures and mileage · ranked #1695 of 5428 models· other Lambretta models: LI125, GP200, LI150, GP150, GP125, SX200