Gilera 600 vs Suzuki GSF600

The Suzuki GSF600 passes its MOT first time more often than the Gilera 600: 77.3% vs 66.7%, a 10.6-point lead.

MOT reliability, side by side

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

Metric	Gilera 600	Suzuki GSF600
First-time pass rate	66.7%	77.3%
Outright fail rate	16.7%	14.2%
Vs comparable bikes (age & mileage adjusted)	-15.0 pts	-6.1 pts
Engine size	558cc	599cc
Median miles at test	30,333	21,080
MOT tests analysed	156	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.

"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.

Pass rate by mileage

first-time MOT pass rate by miles on the clock at test

Mileage	Gilera 600	Suzuki GSF600
20k-30k miles	67.4%	75.2%
30k-40k miles	67.8%	71.3%

Bands with fewer than 30 tests for either bike are left out.

GILERA 600 66.7% pass · 156 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.