Yamaha XTZ660 vs Kawasaki ZX-6R

The Yamaha XTZ660 passes its MOT first time more often than the Kawasaki ZX-6R: 82.4% vs 78.1%, a 4.3-point lead.

MOT reliability, side by side

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

Metric	Yamaha XTZ660	Kawasaki ZX-6R
First-time pass rate	82.4%	78.1%
Outright fail rate	10.4%	14.0%
Median miles at test	24,737	19,446
MOT tests analysed	2,847	173,956
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.

YAMAHA XTZ660 82.4% pass · 2,847 tests KAWASAKI ZX-6R 78.1% pass · 174k tests

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