CZ 350 vs Kawasaki ZXR400

The CZ 350 passes its MOT first time more often than the Kawasaki ZXR400: 85.9% vs 73.1%, a 12.8-point lead.

MOT reliability, side by side

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

Metric	CZ 350	Kawasaki ZXR400
First-time pass rate	85.9%	73.1%
Outright fail rate	5.5%	18.9%
Vs comparable bikes (age & mileage adjusted)	+1.8 pts	-9.9 pts
Engine size	344cc	398cc
Median miles at test	18,016	23,651
MOT tests analysed	128	14,200
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	CZ 350	Kawasaki ZXR400
0k-10k miles	91.5%	87.1%
20k-30k miles	86.5%	69.9%

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

CZ 350 85.9% pass · 128 tests KAWASAKI ZXR400 73.1% pass · 14.2k tests

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