Jawa 350 vs Kawasaki ZXR400

The Jawa 350 passes its MOT first time more often than the Kawasaki ZXR400: 84.7% vs 73.1%, a 11.6-point lead.

MOT reliability, side by side

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

Metric	Jawa 350	Kawasaki ZXR400
First-time pass rate	84.7%	73.1%
Outright fail rate	8.1%	18.9%
Vs comparable bikes (age & mileage adjusted)	-1.8 pts	-9.9 pts
Engine size	343cc	398cc
Rank among all models	#2572 of 5428	#4490 of 5428
Median miles at test	9,003	23,651
MOT tests analysed	444	14,200
Most common failure	brakes	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 test year

first-time MOT pass rate in each calendar year both bikes were tested

Test year	Jawa 350	Kawasaki ZXR400
2008	77.4%	72.6%
2015	78.4%	75.5%
2016	93.3%	75.6%

Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.

Pass rate by mileage

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

Mileage	Jawa 350	Kawasaki ZXR400
0k-10k miles	84.6%	87.1%
10k-20k miles	81.2%	77.4%
20k-30k miles	88.2%	69.9%

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

JAWA 350 84.7% pass · 444 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.