CCM 644 DS vs Suzuki GSF600

The CCM 644 DS passes its MOT first time more often than the Suzuki GSF600: 79.1% vs 77.3%, a 1.8-point lead.

MOT reliability, side by side

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

Metric	CCM 644 DS	Suzuki GSF600
First-time pass rate	79.1%	77.3%
Outright fail rate	10.4%	14.2%
Vs comparable bikes (age & mileage adjusted)	-8.1 pts	-6.1 pts
Engine size	644cc	599cc
Rank among all models	#3752 of 5428	#4013 of 5428
Median miles at test	6,830	21,080
MOT tests analysed	2,014	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.

What fails, side by side

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

Component	CCM 644 DS	Suzuki GSF600
Lights & signalling	7.0%	6.7%
Steering & suspension	3.9%	3.6%
Brakes	1.2%	6.1%
Tyres & wheels	1.7%	3.3%
Structure & body	0.6%	1.5%
Drive system	0.5%	1.4%
Fuel & exhaust	0.6%	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	CCM 644 DS	Suzuki GSF600
2018	81.5%	77.7%
2019	78.0%	76.7%
2020	86.0%	77.8%
2021	86.8%	76.8%
2022	77.0%	78.1%
2023	80.0%	78.2%
2024	86.3%	78.9%
2025	79.5%	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	CCM 644 DS	Suzuki GSF600
0k-10k miles	81.9%	86.8%
10k-20k miles	71.7%	80.1%
20k-30k miles	83.7%	75.2%

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

CCM 644 DS vs Suzuki GSF600 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the CCM 644 DS or the Suzuki GSF600?

The CCM 644 DS passes its MOT first time more often than the Suzuki GSF600: 79.1% vs 77.3%, a 1.8-point lead. Adjusted for age, mileage and test class, the Suzuki GSF600 still comes out ahead: -8.1 points vs comparable bikes for the CCM 644 DS, -6.1 for the Suzuki GSF600. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the CCM 644 DS fail its MOT on most?

Lights & signalling: 7.0% of CCM 644 DS MOT tests failed on it, then steering & suspension (3.9%).

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 CCM 644 DS or the Suzuki GSF600?

At 20k-30k miles the CCM 644 DS passes first time more often: 83.7% for the CCM 644 DS vs 75.2% for the Suzuki GSF600.

CCM 644 DS 79.1% pass · 2,014 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.