KAWASAKI ZEPHYR 550 vs SUZUKI GSF600

The KAWASAKI ZEPHYR 550 passes its MOT first time more often than the SUZUKI GSF600 — 77.9% vs 77.3%, a 0.6-point lead.

MOT reliability, side by side

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

Metric	KAWASAKI ZEPHYR 550	SUZUKI GSF600
First-time pass rate	77.9%	77.3%
Outright fail rate	15.2%	14.2%
Median miles at test	22,978	21,080
MOT tests analysed	7,405	143,023
Most common failure	brakes	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 ZEPHYR 550 77.9% pass · 7,405 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.