Generic Worx 125 vs Yamaha YBR 125

The Yamaha YBR 125 passes its MOT first time more often than the Generic Worx 125: 71.0% vs 68.3%, a 2.7-point lead.

MOT reliability, side by side

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

Metric	Generic Worx 125	Yamaha YBR 125
First-time pass rate	68.3%	71.0%
Outright fail rate	24.6%	17.1%
Vs comparable bikes (age & mileage adjusted)	-4.2 pts	-1.1 pts
Engine size	125cc	124cc
Rank among all models	#4840 of 5428	#4664 of 5428
Median miles at test	8,440	10,652
MOT tests analysed	398	124,897
Most common failure	brakes	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	Generic Worx 125	Yamaha YBR 125
2015	58.3%	71.2%
2016	73.5%	71.3%
2017	67.2%	70.7%
2018	71.4%	72.0%

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

Pass rate by mileage

first-time MOT pass rate by miles on the clock at test

Mileage	Generic Worx 125	Yamaha YBR 125
0k-10k miles	74.2%	76.8%
10k-20k miles	58.0%	67.4%
20k-30k miles	65.7%	63.8%

Bands with fewer than 30 tests for either bike are left out.

GENERIC WORX 125 68.3% pass · 398 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.