Panther 120 vs Suzuki GSF600

The Panther 120 passes its MOT first time more often than the Suzuki GSF600: 89.8% vs 77.3%, a 12.5-point lead.

MOT reliability, side by side

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

Metric	Panther 120	Suzuki GSF600
First-time pass rate	89.8%	77.3%
Outright fail rate	1.6%	14.2%
Engine size	650cc	599cc
Rank among all models	#1025 of 5428	#4013 of 5428
Median miles at test	19,721	21,080
MOT tests analysed	314	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.

Pass rate by mileage

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

Mileage	Panther 120	Suzuki GSF600
0k-10k miles	89.1%	86.8%
10k-20k miles	90.9%	80.1%
20k-30k miles	97.3%	75.2%
30k-40k miles	86.7%	71.3%
40k-50k miles	96.9%	69.4%

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

PANTHER 120 89.8% pass · 314 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.