Matchless G15 vs Suzuki GSF600

The Matchless G15 passes its MOT first time more often than the Suzuki GSF600: 94.1% vs 77.3%, a 16.8-point lead.

MOT reliability, side by side

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

Metric	Matchless G15	Suzuki GSF600
First-time pass rate	94.1%	77.3%
Outright fail rate	2.0%	14.2%
Engine size	750cc	599cc
Rank among all models	#153 of 5428	#4013 of 5428
Median miles at test	9,190	21,080
MOT tests analysed	254	143,023
Most common failure	steering and suspension	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.

Pass rate by mileage

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

Mileage	Matchless G15	Suzuki GSF600
0k-10k miles	93.4%	86.8%
10k-20k miles	92.0%	80.1%

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

MATCHLESS G15 94.1% pass · 254 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.