Brixton BX 125 R vs Yamaha YBR 125

The Yamaha YBR 125 passes its MOT first time more often than the Brixton BX 125 R: 71.0% vs 66.2%, a 4.8-point lead.

MOT reliability, side by side

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

Metric	Brixton BX 125 R	Yamaha YBR 125
First-time pass rate	66.2%	71.0%
Outright fail rate	22.3%	17.1%
Vs comparable bikes (age & mileage adjusted)	-12.0 pts	-1.1 pts
Engine size	125cc	124cc
Median miles at test	3,487	10,652
MOT tests analysed	148	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.

Pass rate by test year

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

Test year	Brixton BX 125 R	Yamaha YBR 125
2023	72.5%	71.1%
2024	64.1%	70.9%
2025	56.4%	71.2%

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

BRIXTON BX 125 R 66.2% pass · 148 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.