KTM 125 DUKE 20 MOT pass rate and common failures

KTM 125 DUKE 20 motorcycles pass the MOT 71.52% of the time, measured across 323 tests in the DVSA record. A further 10.22% passed only after a defect was put right at the test station.

Worse than average: 15.4 points below the 86.87% figure for all motorcycles tested.

Pass rate 71.52% 231 of 323

Fixed at the station 10.22% passed after an on-the-spot repair

Average mileage at test 9,895 miles

Average age at test 4.8 years old

Engine 125cc MOT class 1 and 2

For sale now 0 KTM 125 DUKE 20 adverts

What to check before the MOT

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

Start with missing - it accounts for 55.9% of failed tests on this model.
Then check not working and excessively binding, the next two most common reasons.
The most common advisory is tread depth is below minimum requirements of 1.0mm (8% of all tests) - not a failure, but money you will spend sooner or later.
Average recorded mileage at test is 9,895 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
3-5 years	71.52%		323

Why the KTM 125 DUKE 20 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	Missing	55.9%	33
2	Not working	39%	23
3	Excessively binding	16.9%	10
4	Indicates excessive fluctuation of brake effort	16.9%	10
5	Does not illuminate by the operation of both brake controls	13.6%	8
6	Excessively loose	11.9%	7
7	Tread depth is below minimum requirements of 1.0mm	11.9%	7
8	Flashing more than 120 times a minute	10.2%	6
9	Inoperative in the case of a single lamp or all lamps	10.2%	6
10	Has a serious fluid leak	8.5%	5

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	Tread depth is below minimum requirements of 1.0mm	8%	26
2	Noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition	7.7%	25
3	Excessively loose	4.6%	15
4	Worn to excess	4.6%	15
5	Excessively binding	3.7%	12
6	Has a serious fluid leak	3.1%	10
7	Indicates excessive fluctuation of brake effort	3.1%	10
8	Is so short that the brake cannot be readily applied	3.1%	10
9	Less than 1.0 mm thick	2.5%	8
10	In such a condition that it is seriously weakened	1.9%	6

KTM 125 DUKE 20 for sale

No KTM 125 DUKE 20 in stock at the moment - 297 other KTM bikes are advertised.

Used KTM 125 DUKE 20 Used KTM All KTM KTM 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

KTM 125 DUKE 20 MOT questions

What is the MOT pass rate for the KTM 125 DUKE 20?+

71.52% of KTM 125 DUKE 20 MOT tests end in a pass, based on 323 tests in the DVSA dataset.

What is the most common MOT failure on a KTM 125 DUKE 20?+

Missing, which appears in 55.9% of failed tests on this model.

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.