Yamaha WR426 vs Kawasaki ER5

The Yamaha WR426 passes its MOT first time more often than the Kawasaki ER5: 78.1% vs 77.4%, a 0.7-point lead.

MOT reliability, side by side

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

Metric	Yamaha WR426	Kawasaki ER5
First-time pass rate	78.1%	77.4%
Outright fail rate	12.9%	14.2%
Median miles at test	1,981	21,259
MOT tests analysed	876	53,115
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.

YAMAHA WR426 78.1% pass · 876 tests KAWASAKI ER5 77.4% pass · 53.1k tests

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