Bsa Gold Flash vs Suzuki GSF600

The Bsa Gold Flash passes its MOT first time more often than the Suzuki GSF600: 92.6% vs 77.3%, a 15.3-point lead.

MOT reliability, side by side

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

Metric	Bsa Gold Flash	Suzuki GSF600
First-time pass rate	92.6%	77.3%
Outright fail rate	2.7%	14.2%
Engine size	650cc	599cc
Rank among all models	#367 of 5428	#4013 of 5428
Median miles at test	11,717	21,080
MOT tests analysed	1,316	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.

What fails, side by side

share of each bike's MOT tests that failed on the component · lower is better

Component	Bsa Gold Flash	Suzuki GSF600
Lights & signalling	0.8%	6.7%
Brakes	0.5%	6.1%
Steering & suspension	1.3%	3.6%
Tyres & wheels	0.5%	3.3%
Drive system	0.3%	1.4%
Structure & body	0.1%	1.5%
Fuel & exhaust	0.2%	1.2%

A test that fails on two components counts once in each. Component links go to the bikes most likely to fail on it.

Pass rate by test year

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

Test year	Bsa Gold Flash	Suzuki GSF600
2010	92.2%	75.8%
2011	96.2%	76.1%
2012	94.5%	75.9%
2013	93.2%	74.7%
2014	88.2%	75.0%
2015	92.4%	75.5%
2016	92.2%	76.1%
2017	92.5%	77.0%

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	Bsa Gold Flash	Suzuki GSF600
0k-10k miles	94.3%	86.8%
10k-20k miles	91.9%	80.1%
20k-30k miles	90.9%	75.2%
30k-40k miles	92.7%	71.3%
40k-50k miles	89.4%	69.4%
50k-60k miles	89.0%	68.3%

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

Bsa Gold Flash vs Suzuki GSF600 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Bsa Gold Flash or the Suzuki GSF600?

The Bsa Gold Flash passes its MOT first time more often than the Suzuki GSF600: 92.6% vs 77.3%, a 15.3-point lead. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Bsa Gold Flash fail its MOT on most?

Steering & suspension: 1.3% of Bsa Gold Flash MOT tests failed on it, then lights & signalling (0.8%).

What does the Suzuki GSF600 fail its MOT on most?

Lights & signalling: 6.7% of Suzuki GSF600 MOT tests failed on it, then brakes (6.1%).

Which holds up better at high mileage, the Bsa Gold Flash or the Suzuki GSF600?

At 50k-60k miles the Bsa Gold Flash passes first time more often: 89.0% for the Bsa Gold Flash vs 68.3% for the Suzuki GSF600.

BSA GOLD FLASH 92.6% pass · 1,316 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.