BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
League table/ MZ/ETZ250
Model report · 2005–2025

MZ ETZ250

243cc Petrol Class 2
#2016 of 5426 overall #6 of 20 MZs #1223 of 2787 other bikes
86.6%
first-time pass rate
5.6%
failed outright
27,080
median miles at test
2,568
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2005–2025

The ETZ250's first-time pass rate has risen 5.6 points since 2005, 83.3% to 88.9%.

79%89%99%2005: 83.3% pass (60 tests)2006: 87.3% pass (212 tests)2007: 89.6% pass (182 tests)2008: 83.5% pass (182 tests)2009: 87.8% pass (172 tests)2010: 82.3% pass (158 tests)2011: 82.8% pass (163 tests)2012: 83.5% pass (158 tests)2013: 82.9% pass (158 tests)2014: 88.2% pass (161 tests)2015: 88.6% pass (149 tests)2016: 83.7% pass (129 tests)2017: 91.5% pass (118 tests)2018: 83.3% pass (90 tests)2019: 87.5% pass (72 tests)2020: 91.7% pass (72 tests)2021: 87.8% pass (82 tests)2022: 88.3% pass (77 tests)2023: 95.9% pass (73 tests)2024: 92.7% pass (55 tests)2025: 88.9% pass (45 tests)20052025

Pass rate by mileage

how the ETZ250's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage ETZ250 passes first time 81.1% of the time; by 50k that's 94.1%.

79%88%97%0k: 81.1% pass (244 tests)10k: 86.0% pass (620 tests)20k: 86.9% pass (594 tests)30k: 88.8% pass (491 tests)40k: 81.9% pass (221 tests)50k: 94.1% pass (153 tests)0k30k50k

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 ETZ250

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lighting and signalling
94 33.6 0.6×
brakes
65 23.2 0.4×
steering and suspension
50 17.9 0.6×
tyres and wheels
32 11.4 0.6×
body and structure
9 3.2 0.6×
tyres
8 2.9 0.4×
lamps and reflectors
7 2.5 0.1×
reg plates and vin
6 2.1 0.4×
fuel and exhaust
5 1.8 0.2×
suspension
4 1.4 0.2×

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the ETZ250 beats 4 of its 4 closest rivals (YAMAHA YP250, YAMAHA WR250F, HONDA XR250).

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 ETZ250.

Pass rate by registration year

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

Best year to buy used: 1984 (91.8% pass). Weakest: 1981 (80.3%).

78%86%94%1981: 80.3% pass (61 tests)1982: 85.7% pass (84 tests)1984: 91.8% pass (171 tests)1985: 87.0% pass (231 tests)1986: 90.5% pass (222 tests)1987: 85.4% pass (239 tests)1988: 86.1% pass (404 tests)1989: 87.3% pass (502 tests)1990: 84.0% pass (250 tests)1996: 89.1% pass (64 tests)198119871996

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.

MZ ETZ250 FAQ

answers computed from the data above · terms in the glossary

Is the MZ ETZ250 reliable?

The MZ ETZ250 is about average for its class: 86.6% of its 2,568 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #2016 of 5426 models.

What does a ETZ250 fail its MOT on most?

lighting and signalling — 34% of all defects recorded against failed ETZ250 tests.

What is the best year of ETZ250 to buy used?

By first-time pass rate, 1984-registered examples do best (91.8%) and 1981 worst (80.3%). Condition and history still trump the year.

How many miles will a ETZ250 last?

The median ETZ250 shows 27,080 miles at test, and examples around 50k miles still pass 94.1% of the time — mileage alone rarely kills one.