MZ 301 vs Yamaha YP250

The MZ 301 passes its MOT first time more often than the Yamaha YP250: 87.1% vs 82.5%, a 4.6-point lead.

MOT reliability, side by side

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

Metric	MZ 301	Yamaha YP250
First-time pass rate	87.1%	82.5%
Outright fail rate	6.9%	12.3%
Vs comparable bikes (age & mileage adjusted)	+5.6 pts	-2.3 pts
Engine size	291cc	249cc
Median miles at test	39,852	15,613
MOT tests analysed	116	12,433
Most common failure	lighting and signalling	brakes

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.

MZ 301 87.1% pass · 116 tests YAMAHA YP250 82.5% pass · 12.4k tests

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