MZ ETZ300

291cc Petrol Class 2

#2230 of 5426 overall #8 of 20 MZs #1380 of 2787 other bikes

85.9%

first-time pass rate

5.3%

failed outright

26,569

median miles at test

304

MOT tests, 2005–2025

Pass rate by mileage

how the ETZ300's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage ETZ300 passes first time 91.9% of the time; by 30k that's 80.4%.

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 ETZ300

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	19	52.8
brakes	7	19.4
steering and suspension	3	8.3
tyres and wheels	3	8.3
lamps and reflectors	2	5.6
suspension	2	5.6

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 ETZ300 beats 3 of its 4 closest rivals (YAMAHA RD350, YAMAHA YP250, YAMAHA WR250F).

YAMAHA RD350 86.3% pass · 19.6k tests YAMAHA YP250 82.5% pass · 12.4k tests YAMAHA WR250F 78.0% pass · 10.5k tests HONDA XR250 78.8% pass · 9,277 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 ETZ300.

Pass rate by registration year

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

Best year to buy used: 1988 (90.0% pass). Weakest: 1989 (89.9%).

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.