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League table/ SKYTEAM/ST 125 SM
Model report · 2005–2025

SKYTEAM ST 125 SM

124cc Petrol Class 1
49.0%
first-time pass rate
37.8%
failed outright
4,640
median miles at test
143
MOT tests, 2005–2025
-26.9pp
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.

What fails on a ST 125 SM

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lighting and signalling
80 36.9
steering and suspension
59 27.2
brakes
35 16.1
drive system
13 6
reg plates and vin
10 4.6
body and structure
7 3.2
tyres and wheels
6 2.8
fuel and exhaust
3 1.4
lamps and reflectors
2 0.9
driving controls
2 0.9

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 ST 125 SM beats 0 of its 4 closest rivals (YAMAHA YBR 125, HONDA CG125, HONDA CBF125).

YAMAHA YBR 125 71.0% pass · 125k tests Compare head-to-head →
HONDA CG125 72.2% pass · 89.3k tests Compare head-to-head →
HONDA CBF125 73.3% pass · 84.4k tests Compare head-to-head →
GILERA RUNNER 70.8% pass · 69.9k 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 ST 125 SM.

Compare with any bike

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

More SKYTEAM models

other SKYTEAM bikes ranked by MOT pass rate
SKYTEAM ST 82.7% pass · 901 tests
SKYTEAM 05 88.5% pass · 339 tests
SKYTEAM ST 110-8A GORILLA 81.9% pass · 238 tests
SKYTEAM ST 50-3 SM 52.1% pass · 236 tests
SKYTEAM 24 70.1% pass · 234 tests
SKYTEAM 17 72.7% pass · 227 tests

See all SKYTEAM models →

Pass rate by registration year

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

Best year to buy used: 2005 (41.1% pass). Weakest: 2005 (41.1%).

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.

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