Kawasaki Z550 vs Suzuki GSF600

The Suzuki GSF600 passes its MOT first time more often than the Kawasaki Z550: 77.3% vs 76.8%, a 0.5-point lead.

MOT reliability, side by side

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

Metric	Kawasaki Z550	Suzuki GSF600
First-time pass rate	76.8%	77.3%
Outright fail rate	16.0%	14.2%
Median miles at test	29,735	21,080
MOT tests analysed	1,796	143,023
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.

KAWASAKI Z550 76.8% pass · 1,796 tests SUZUKI GSF600 77.3% pass · 143k tests

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