MZ ETZ150 vs Bsa Bantam

The MZ ETZ150 passes its MOT first time more often than the Bsa Bantam: 90.8% vs 88.7%, a 2.1-point lead.

MOT reliability, side by side

first-time pass rate, outright fail rate and tests analysed · 2005–2025

Metric	MZ ETZ150	Bsa Bantam
First-time pass rate	90.8%	88.7%
Outright fail rate	4.6%	5.4%
Vs comparable bikes (age & mileage adjusted)	+14.3 pts	+5.1 pts
Engine size	143cc	175cc
Median miles at test	19,827	13,193
MOT tests analysed	130	7,202
Most common failure	lighting and signalling	lighting and signalling

First-time outcomes on normal tests, 2005–2025. "Most common failure" is the component group with the most recorded defects on failed tests. Read pass rates against test counts: a smaller sample is noisier. Source: DVSA anonymised MOT results.

"Vs comparable bikes" is the first-time pass rate minus the rate expected for each bike's own mix of age, mileage and test class, in percentage points: positive means better than comparable bikes. How this works.

Pass rate by mileage

first-time MOT pass rate by miles on the clock at test

Mileage	MZ ETZ150	Bsa Bantam
10k-20k miles	86.5%	89.0%
20k-30k miles	97.0%	87.8%

Bands with fewer than 30 tests for either bike are left out.

MZ ETZ150 90.8% pass · 130 tests BSA BANTAM 88.7% pass · 7,202 tests

See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.