Ajs 18S vs Kawasaki ZX-6R

The Ajs 18S passes its MOT first time more often than the Kawasaki ZX-6R — 92.8% vs 78.1%, a 14.7-point lead.

MOT reliability, side by side

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

Metric	Ajs 18S	Kawasaki ZX-6R
First-time pass rate	92.8%	78.1%
Outright fail rate	3.0%	14.0%
Median miles at test	14,829	19,446
MOT tests analysed	598	173,956
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.

AJS 18S 92.8% pass · 598 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.