Suzuki GN125 MOT pass rate and common failures

Suzuki GN125 motorcycles pass the MOT 70.41% of the time, measured across 338 tests in the DVSA record. A further 10.95% passed only after a defect was put right at the test station.

Worse than average: 16.5 points below the 86.87% figure for all motorcycles tested.

Pass rate 70.41% 238 of 338

Fixed at the station 10.95% passed after an on-the-spot repair

Average mileage at test 18,697 miles

Average age at test 21.9 years old

Engine 124cc MOT class 1 and 2

For sale now 0 Suzuki GN125 adverts

What to check before the MOT

Built from this model's own failure record, not general advice.

Start with not working - it accounts for 55.6% of failed tests on this model.
Then check too high and missing, the next two most common reasons.
Age matters here: 88.1% of 11-15 year old examples pass, against 67.02% at 16+ years - a gap of 21.1 points.
The most common advisory is excessively loose (5.6% of all tests) - not a failure, but money you will spend sooner or later.
Average recorded mileage at test is 18,697 miles, which is the number to compare any advert against.

Pass rate by age

A single pass rate hides the most useful thing in this data: how the same model behaves at three years old and at fifteen.

Age at test	Pass rate		Tests
11-15 years	88.1%		42
16+ years	67.02%		285

Why the Suzuki GN125 fails

Share of failed tests on this model where the item was recorded. One test can fail on several items, so the column does not add up to 100%.

#	Item	Of failures	Tests
1	Not working	55.6%	35
2	Too high	25.4%	16
3	Missing	22.2%	14
4	Not working on dipped beam	19%	12
5	Projected beam image obviously incorrect	17.5%	11
6	Insecure	15.9%	10
7	Does not illuminate by the operation of both brake controls	14.3%	9
8	Excessively binding	14.3%	9
9	Has a serious fluid leak	14.3%	9
10	Not working on main beam	14.3%	9

Most common advisories

Not a failure and not a legal requirement to fix - but an advisory that repeats year after year is money the next owner spends.

#	Item	Of all tests	Tests
1	Excessively loose	5.6%	19
2	Has a serious fluid leak	5.6%	19
3	Sprocket worn to excess	4.4%	15
4	Has excessive play	4.1%	14
5	Worn to excess	4.1%	14
6	Tread depth is below minimum requirements of 1.0mm	3.3%	11
7	Excessively stiff or notchy	2.7%	9
8	Chain guard missing	2.4%	8
9	Insecure	2.4%	8
10	Corroded and seriously weakened	2.1%	7

Suzuki GN125 for sale

No Suzuki GN125 in stock at the moment - 528 other Suzuki bikes are advertised.

Used Suzuki GN125 Used Suzuki All Suzuki Suzuki MOT statistics

Similar bikes compared

Models of comparable capacity, so the comparison means something.

Model	Tests	Pass rate	Avg mileage
Yamaha GPD125-A NMAX 125 · 125cc	8,762	80.8%	45,039
Piaggio VESPA 79-210cc · 79-210cc	8,363	85.42%	11,710
Honda WW · 125cc	7,252	80.32%	40,134
Honda WW 125 A-M · 125cc	5,011	84.06%	29,846
Honda GLR · 125cc	4,737	79.99%	14,642
Honda CBF 100-125cc · 100-125cc	3,204	77%	15,203

Source: DVSA MOT testing data, 2025 · updated Aug 2026 · licence and method

Suzuki GN125 MOT questions

What is the MOT pass rate for the Suzuki GN125?+

70.41% of Suzuki GN125 MOT tests end in a pass, based on 338 tests in the DVSA dataset.

What is the most common MOT failure on a Suzuki GN125?+

Not working, which appears in 55.6% of failed tests on this model.

Does the Suzuki GN125 get harder to pass as it ages?+

At 16+ years old the pass rate is 67.02%, against 88.1% for examples 11-15 years old.

Where does this data come from?+

From the DVSA anonymised MOT testing dataset, which records every MOT carried out in England, Scotland and Wales. It is published under the Open Government Licence and covers 2025.

Does a high pass rate mean the bike is reliable?+

Not by itself. The MOT checks safety items - brakes, tyres, lights, structure - and says nothing about engines, gearboxes or electrics. Read it as a maintenance signal, not a reliability score.