Bimota YB9 vs Yamaha FZS600

The Yamaha FZS600 passes its MOT first time more often than the Bimota YB9: 82.6% vs 79.8%, a 2.8-point lead.

MOT reliability, side by side

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

Metric	Bimota YB9	Yamaha FZS600
First-time pass rate	79.8%	82.6%
Outright fail rate	13.8%	10.6%
Vs comparable bikes (age & mileage adjusted)	-3.3 pts	-0.8 pts
Engine size	598cc	599cc
Median miles at test	14,610	21,612
MOT tests analysed	109	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.

"Vs comparable bikes" is the first-time pass rate minus the rate expected for each bike's own mix of age, mileage and test class, in percentage points: positive means better than comparable bikes. How this works.

BIMOTA YB9 79.8% pass · 109 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.