MZ 125SX

124cc Petrol Class 1

#4938 of 5426 overall #19 of 20 MZs #485 of 734 commuter bikes

66.5%

first-time pass rate

22.8%

failed outright

14,974

median miles at test

263

MOT tests, 2005–2025

Pass rate by mileage

how the 125SX's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage 125SX passes first time 76.1% of the time; by 20k that's 62.8%.

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 125SX

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	66	34.7
brakes	41	21.6
steering and suspension	27	14.2
drive system	23	12.1
tyres and wheels	13	6.8
lamps and reflectors	11	5.8
body and structure	4	2.1
driving controls	2	1.1
wheels	2	1.1
structure and attachments	1	0.5

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 125SX 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 125SX.

Pass rate by registration year

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

Best year to buy used: 2002 (76.3% pass). Weakest: 2004 (66.7%).

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.