BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
Model report · 2005–2025
86.4%
first-time pass rate
6.3%
failed outright
2,260
median miles at test
4,466
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2025

The GP's first-time pass rate has held steady since 2006 (89.0% → 89.4%).

79%87%95%2006: 89.0% pass (209 tests)2007: 85.7% pass (238 tests)2008: 84.8% pass (257 tests)2009: 81.9% pass (287 tests)2010: 83.0% pass (317 tests)2011: 82.3% pass (310 tests)2012: 85.8% pass (317 tests)2013: 87.2% pass (360 tests)2014: 86.4% pass (369 tests)2015: 88.8% pass (358 tests)2016: 87.3% pass (332 tests)2017: 88.9% pass (316 tests)2018: 91.2% pass (193 tests)2019: 86.4% pass (132 tests)2020: 91.7% pass (84 tests)2021: 82.9% pass (111 tests)2022: 88.2% pass (85 tests)2023: 86.3% pass (73 tests)2024: 92.0% pass (50 tests)2025: 89.4% pass (47 tests)20062025

Pass rate by mileage

how the GP's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage GP passes first time 85.8% of the time; by 40k that's 100.0%.

74%87%100%0k: 85.8% pass (3,597 tests)10k: 91.8% pass (476 tests)20k: 88.5% pass (156 tests)30k: 78.4% pass (37 tests)40k: 100.0% pass (36 tests)0k20k40k

First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.

What fails on a GP

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lighting and signalling
226 36.8 0.7×
brakes
160 26.1 0.6×
steering and suspension
96 15.6 0.5×
tyres and wheels
39 6.4 0.4×
lamps and reflectors
29 4.7 0.3×
fuel and exhaust
18 2.9 0.4×
reg plates and vin
17 2.8 0.6×
body and structure
11 1.8 0.5×
steering
9 1.5 0.4×
Items Not Tested
9 1.5 0.7×

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the GP beats 4 of its 4 closest rivals (PIAGGIO VESPA, HONDA PCX 125, HONDA Vision 110).

Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the GP.

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Best year to buy used: 1968 (93.5% pass). Weakest: 1982 (78.3%).

75%86%97%1968: 93.5% pass (62 tests)1969: 85.7% pass (496 tests)1970: 86.3% pass (637 tests)1971: 88.6% pass (535 tests)1976: 84.0% pass (131 tests)1977: 90.5% pass (63 tests)1978: 83.9% pass (205 tests)1979: 87.5% pass (368 tests)1980: 88.1% pass (344 tests)1981: 83.3% pass (294 tests)1982: 78.3% pass (92 tests)1983: 87.4% pass (87 tests)1984: 85.6% pass (111 tests)1985: 80.0% pass (230 tests)1986: 92.5% pass (106 tests)196819791986

First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.

LAMBRETTA GP FAQ

answers computed from the data above · terms in the glossary

Is the LAMBRETTA GP reliable?

The LAMBRETTA GP is more reliable than average for its class: 86.4% of its 4,466 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #2089 of 5426 models.

What does a GP fail its MOT on most?

lighting and signalling — 37% of all defects recorded against failed GP tests.

What is the best year of GP to buy used?

By first-time pass rate, 1968-registered examples do best (93.5%) and 1982 worst (78.3%). Condition and history still trump the year.

How many miles will a GP last?

The median GP shows 2,260 miles at test, and examples around 40k miles still pass 100.0% of the time — mileage alone rarely kills one.