YAMAHA BL125

123cc Petrol Class 1

#4923 of 5426 overall #386 of 409 YAMAHAs #479 of 734 commuter bikes

66.7%

first-time pass rate

20.5%

failed outright

13,289

median miles at test

210

MOT tests, 2005–2025

Pass rate by mileage

how the BL125's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage BL125 passes first time 80.7% of the time; by 20k that's 60.4%.

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 BL125

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	44	36.4
steering and suspension	22	18.2
brakes	19	15.7
tyres and wheels	18	14.9
fuel and exhaust	5	4.1
drive system	4	3.3
Items Not Tested	3	2.5
body and structure	3	2.5
structure and attachments	2	1.7
lamps and reflectors	1	0.8

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 BL125 beats 0 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 BL125.

Pass rate by registration year

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

Best year to buy used: 1993 (70.6% pass). Weakest: 1992 (63.5%).

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.