Kawasaki ZX636 B1H vs Yamaha FZS600

The Kawasaki ZX636 B1H passes its MOT first time more often than the Yamaha FZS600: 83.8% vs 82.6%, a 1.2-point lead.

MOT reliability, side by side

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

Metric	Kawasaki ZX636 B1H	Yamaha FZS600
First-time pass rate	83.8%	82.6%
Outright fail rate	9.1%	10.6%
Median miles at test	12,500	21,612
MOT tests analysed	1,367	136,558
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 ZX636 B1H 83.8% pass · 1,367 tests YAMAHA FZS600 82.6% pass · 137k tests

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