MZ 250 vs Yamaha YP250

The MZ 250 passes its MOT first time more often than the Yamaha YP250: 88.4% vs 82.5%, a 5.9-point lead.

MOT reliability, side by side

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

Metric	MZ 250	Yamaha YP250
First-time pass rate	88.4%	82.5%
Outright fail rate	6.6%	12.3%
Vs comparable bikes (age & mileage adjusted)	+4.1 pts	-2.3 pts
Engine size	243cc	249cc
Rank among all models	#1478 of 5428	#3073 of 5428
Median miles at test	26,887	15,613
MOT tests analysed	335	12,433
Most common failure	brakes	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.

Pass rate by mileage

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

Mileage	MZ 250	Yamaha YP250
0k-10k miles	87.2%	88.6%
10k-20k miles	88.6%	82.5%
20k-30k miles	87.9%	78.6%
30k-40k miles	88.9%	77.0%
40k-50k miles	93.2%	71.9%

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

MZ 250 88.4% pass · 335 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.