BIKERELIABILITY Reg check
League table/ LAMBRETTA/GP150
Model report · 2005–2025

LAMBRETTA GP150

148cc Petrol Class 1
#1725 of 5428 overall #32 of 49 LAMBRETTAs #69 of 412 scooter bikes
87.6%
first-time pass rate
7.2%
failed outright
1,735
median miles at test
12.1k
MOT tests, 2005–2025
+3.2pp
vs expected · age & mileage

The pass rate is the MOT first-time pass: a roadworthiness check of the items an MOT covers (brakes, lights, tyres, steering, structure, emissions), not a full mechanical inspection of engine or gearbox internals. It is a reliability signal, not a complete measure of mechanical reliability. What this measures.

“vs expected” adjusts for age, mileage and test class, so a cherished classic and a hard-used commuter are compared fairly. How this works.

Pass rate over time

first-time pass rate by test year · 2005–2025

The GP150's first-time pass rate has risen 9.6 points since 2005, 86.6% to 96.2%.

80%90%99%2005: 86.6% pass (97 tests)2006: 85.3% pass (633 tests)2007: 83.8% pass (692 tests)2008: 83.5% pass (717 tests)2009: 84.3% pass (775 tests)2010: 85.1% pass (825 tests)2011: 83.8% pass (819 tests)2012: 86.2% pass (827 tests)2013: 86.0% pass (878 tests)2014: 89.3% pass (867 tests)2015: 89.9% pass (868 tests)2016: 89.4% pass (879 tests)2017: 90.3% pass (888 tests)2018: 90.7% pass (517 tests)2019: 91.6% pass (404 tests)2020: 91.9% pass (307 tests)2021: 89.7% pass (340 tests)2022: 91.0% pass (266 tests)2023: 92.5% pass (227 tests)2024: 94.5% pass (165 tests)2025: 96.2% pass (132 tests)20052025

Pass rate by mileage

how the GP150's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage GP150 passes first time 87.2% of the time; by 50k that's 84.1%.

80%86%92%0k: 87.2% pass (9,942 tests)10k: 89.3% pass (926 tests)20k: 89.5% pass (534 tests)30k: 90.0% pass (229 tests)40k: 81.5% pass (124 tests)50k: 84.1% pass (69 tests)0k30k50k

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 GP150

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lighting and signalling
717 36.5 0.9×
brakes
505 25.7 0.7×
steering and suspension
325 16.5 0.7×
lamps and reflectors
122 6.2 0.3×
tyres and wheels
109 5.5 0.4×
fuel and exhaust
52 2.6 0.5×
reg plates and vin
50 2.5 0.6×
body and structure
34 1.7 0.5×
driving controls
30 1.5 1.1×
Items Not Tested
23 1.2 1.7×

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 GP150 beats 4 of its 4 closest rivals (PIAGGIO VESPA, HONDA PCX 125, HONDA Vision 110).

PIAGGIO VESPA 80.7% pass · 287k tests Compare head-to-head →
HONDA PCX 125 81.1% pass · 88.6k tests Compare head-to-head →
HONDA Vision 110 78.1% pass · 50.9k tests Compare head-to-head →
YAMAHA NMAX 125 82.2% pass · 33.8k tests Compare head-to-head →

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 GP150.

Compare with any bike

rival not listed above? pick any model to see it head-to-head with the GP150

More LAMBRETTA models

other LAMBRETTA bikes ranked by MOT pass rate
LAMBRETTA LI125 87.4% pass · 21.3k tests
LAMBRETTA GP200 87.8% pass · 19.9k tests
LAMBRETTA LI150 88.8% pass · 19.3k tests
LAMBRETTA GP125 86.7% pass · 11.7k tests
LAMBRETTA LI 87.7% pass · 8,752 tests
LAMBRETTA SX200 88.8% pass · 6,794 tests

See all LAMBRETTA models →

Pass rate by registration year

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

Best year to buy used: 2009 (95.5% pass). Weakest: 1989 (81.2%).

78%88%98%1959: 84.9% pass (53 tests)1960: 89.1% pass (119 tests)1961: 91.7% pass (120 tests)1962: 93.8% pass (81 tests)1963: 90.9% pass (242 tests)1964: 91.4% pass (267 tests)1965: 91.4% pass (233 tests)1966: 87.4% pass (222 tests)1967: 91.5% pass (130 tests)1968: 94.1% pass (102 tests)1969: 89.1% pass (1,291 tests)1970: 88.6% pass (1,041 tests)1971: 88.1% pass (806 tests)1972: 87.3% pass (71 tests)1975: 90.0% pass (110 tests)1976: 86.0% pass (322 tests)1977: 85.0% pass (240 tests)1978: 84.7% pass (607 tests)1979: 86.3% pass (886 tests)1980: 85.5% pass (887 tests)1981: 84.1% pass (567 tests)1982: 85.5% pass (339 tests)1983: 83.5% pass (418 tests)1984: 86.2% pass (472 tests)1985: 87.2% pass (893 tests)1986: 87.4% pass (246 tests)1988: 86.4% pass (66 tests)1989: 81.2% pass (69 tests)1990: 94.3% pass (53 tests)2004: 91.5% pass (71 tests)2005: 84.7% pass (163 tests)2006: 90.4% pass (136 tests)2007: 91.0% pass (78 tests)2009: 95.5% pass (67 tests)195919782009

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 GP150 FAQ

answers computed from the data above · terms in the glossary

Is the LAMBRETTA GP150 reliable?

The LAMBRETTA GP150 is more reliable than average for its class: 87.6% of its 12,123 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #1725 of 5428 models.

What does a GP150 fail its MOT on most?

lighting and signalling — 36% of all defects recorded against failed GP150 tests.

What is the best year of GP150 to buy used?

By first-time pass rate, 2009-registered examples do best (95.5%) and 1989 worst (81.2%). Condition and history still trump the year.

How many miles will a GP150 last?

The median GP150 shows 1,735 miles at test, and examples around 50k miles still pass 84.1% of the time — mileage alone rarely kills one.

Embed this bike

Free to embed on your site, blog or forum — a live Lambretta GP150 reliability card that stays up to date and links back here. More on the free API page.