YAMAHA R125

124cc Petrol Class 1

75.4%

first-time pass rate

16.2%

failed outright

12,846

median miles at test

179

MOT tests, 2005–2025

Pass rate by mileage

how the R125's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage R125 passes first time 85.3% of the time; by 20k that's 71.0%.

First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.

What fails on a R125

failure defects by component group · advisories excluded

Component group	Defects	% of defects
brakes	24	25.5
lamps and reflectors	22	23.4
lighting and signalling	10	10.6
suspension	9	9.6
tyres and wheels	6	6.4
drive system	6	6.4
structure and attachments	6	6.4
steering and suspension	5	5.3
tyres	3	3.2
steering	3	3.2

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 R125 beats 4 of its 4 closest rivals (YAMAHA YBR 125, HONDA CG125, HONDA CBF125).

YAMAHA YBR 125 71.0% pass · 125k tests HONDA CG125 72.2% pass · 89.3k tests HONDA CBF125 73.3% pass · 84.4k tests GILERA RUNNER 70.8% pass · 69.9k tests

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 R125.

Pass rate by registration year

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

Best year to buy used: 2009 (72.1% pass). Weakest: 2008 (68.8%).

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.