Skyteam ST vs Yamaha YBR 125

The Skyteam ST passes its MOT first time more often than the Yamaha YBR 125: 82.7% vs 71.0%, a 11.7-point lead.

MOT reliability, side by side

first-time pass rate, outright fail rate and tests analysed · 2005–2025

Metric	Skyteam ST	Yamaha YBR 125
First-time pass rate	82.7%	71.0%
Outright fail rate	9.9%	17.1%
Vs comparable bikes (age & mileage adjusted)	+3.4 pts	-1.1 pts
Engine size	124cc	124cc
Rank among all models	#3029 of 5428	#4664 of 5428
Median miles at test	1,468	10,652
MOT tests analysed	901	124,897
Most common failure	lamps and reflectors	brakes

First-time outcomes on normal tests, 2005–2025. "Most common failure" is the component group with the most recorded defects on failed tests. Read pass rates against test counts: a smaller sample is noisier. Source: DVSA anonymised MOT results.

"Vs comparable bikes" is the first-time pass rate minus the rate expected for each bike's own mix of age, mileage and test class, in percentage points: positive means better than comparable bikes. How this works.

What fails, side by side

share of each bike's MOT tests that failed on the component · lower is better

Component	Skyteam ST	Yamaha YBR 125
Lights & signalling	7.0%	8.5%
Steering & suspension	3.1%	6.5%
Brakes	1.7%	5.9%
Tyres & wheels	1.4%	4.4%
Structure & body	1.7%	3.8%
Drive system	0.2%	2.9%
Fuel & exhaust	0.1%	0.6%

A test that fails on two components counts once in each. Component links go to the bikes most likely to fail on it.

Pass rate by test year

first-time MOT pass rate in each calendar year both bikes were tested

Test year	Skyteam ST	Yamaha YBR 125
2018	78.9%	72.0%
2019	83.5%	71.8%
2020	84.7%	73.4%
2021	77.5%	71.6%
2022	81.8%	71.3%
2023	83.3%	71.1%
2024	83.5%	70.9%
2025	92.9%	71.2%

Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.

Skyteam ST vs Yamaha YBR 125 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Skyteam ST or the Yamaha YBR 125?

The Skyteam ST passes its MOT first time more often than the Yamaha YBR 125: 82.7% vs 71.0%, a 11.7-point lead. Adjusted for age, mileage and test class, the Skyteam ST still comes out ahead: +3.4 points vs comparable bikes for the Skyteam ST, -1.1 for the Yamaha YBR 125. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Skyteam ST fail its MOT on most?

Lights & signalling: 7.0% of Skyteam ST MOT tests failed on it, then steering & suspension (3.1%).

What does the Yamaha YBR 125 fail its MOT on most?

Lights & signalling: 8.5% of Yamaha YBR 125 MOT tests failed on it, then steering & suspension (6.5%).

SKYTEAM ST 82.7% pass · 901 tests YAMAHA YBR 125 71.0% pass · 125k tests

See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.