Skyteam ST 90 vs Yamaha YQ100

The Skyteam ST 90 passes its MOT first time more often than the Yamaha YQ100: 71.2% vs 64.7%, a 6.5-point lead.

MOT reliability, side by side

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

Metric	Skyteam ST 90	Yamaha YQ100
First-time pass rate	71.2%	64.7%
Outright fail rate	18.3%	27.2%
Vs comparable bikes (age & mileage adjusted)	-4.7 pts	-7.2 pts
Engine size	85cc	98cc
Median miles at test	2,434	9,888
MOT tests analysed	153	7,747
Most common failure	steering and suspension	lighting and signalling

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.

SKYTEAM ST 90 71.2% pass · 153 tests YAMAHA YQ100 64.7% pass · 7,747 tests

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