BIKERELIABILITY Reg check
League table/ LEXMOTO/STR 125 YB
Model report · 2005–2025
48.5%
first-time pass rate
41.2%
failed outright
7,679
median miles at test
260
MOT tests, 2005–2025
-25.2pp
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 · 2015–2017

The STR 125 YB's first-time pass rate has fallen 1.4 points since 2015, 51.4% to 50.0%.

39%46%54%2015: 51.4% pass (70 tests)2016: 41.1% pass (73 tests)2017: 50.0% pass (36 tests)20152017

What fails on a STR 125 YB

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lighting and signalling
132 28.8
brakes
103 22.4
steering and suspension
97 21.1
drive system
39 8.5
tyres and wheels
21 4.6
body and structure
18 3.9
lamps and reflectors
17 3.7
suspension
11 2.4
structure and attachments
11 2.4
reg plates and vin
10 2.2

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the STR 125 YB beats 0 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 STR 125 YB.

Compare with any bike

rival not listed above? pick any model to see it head-to-head with the STR 125 YB

Pass rate by registration year

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

Best year to buy used: 2011 (49.4% pass). Weakest: 2012 (46.7%).

46%48%50%2011: 49.4% pass (89 tests)2012: 46.7% pass (135 tests)20112012

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.

Embed this bike

Free to embed on your site, blog or forum — a live Lexmoto STR 125 YB reliability card that stays up to date and links back here. More on the free API page.