Moto Guzzi V9 Roamer vs Suzuki GSF600

The Moto Guzzi V9 Roamer passes its MOT first time more often than the Suzuki GSF600: 92.2% vs 77.3%, a 14.9-point lead.

MOT reliability, side by side

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

Metric	Moto Guzzi V9 Roamer	Suzuki GSF600
First-time pass rate	92.2%	77.3%
Outright fail rate	3.5%	14.2%
Vs comparable bikes (age & mileage adjusted)	+3.1 pts	-6.1 pts
Engine size	853cc	599cc
Rank among all models	#434 of 5428	#4013 of 5428
Median miles at test	5,011	21,080
MOT tests analysed	347	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.

"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 test year

first-time MOT pass rate in each calendar year both bikes were tested

Test year	Moto Guzzi V9 Roamer	Suzuki GSF600
2020	100.0%	77.8%
2021	93.0%	76.8%
2022	89.6%	78.1%
2023	91.0%	78.2%
2024	86.7%	78.9%
2025	94.6%	79.6%

Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.

Pass rate by mileage

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

Mileage	Moto Guzzi V9 Roamer	Suzuki GSF600
0k-10k miles	91.4%	86.8%
10k-20k miles	92.3%	80.1%

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

MOTO GUZZI V9 ROAMER 92.2% pass · 347 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.