KTM 125 DUKE 17

125cc Petrol Class 1

#4134 of 5426 overall #192 of 230 KTMs #188 of 205 naked bikes

76.4%

first-time pass rate

13.6%

failed outright

8,692

median miles at test

1,892

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2020–2025

The 125 DUKE 17's first-time pass rate has fallen 15.0 points since 2020, 86.8% to 71.8%.

Pass rate by mileage

how the 125 DUKE 17's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage 125 DUKE 17 passes first time 77.4% of the time; by 20k that's 66.4%.

First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.

What fails on a 125 DUKE 17

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lamps and reflectors	194	31.1	4.3×
structure and attachments	138	22.2	8.1×
brakes	126	20.2	1.1×
steering	47	7.5	5.0×
tyres	44	7.1	2.6×
suspension	43	6.9	2.7×
Identification of the vehicle	24	3.9	5.0×
audible warning (Horn)	6	1	1.7×
wheels	1	0.2	0.9×

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the 125 DUKE 17 beats 0 of its 1 closest rivals (HONDA CB125F).

HONDA CB125F 81.2% pass · 30.6k tests

Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the 125 DUKE 17.

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Best year to buy used: 2017 (77.0% pass). Weakest: 2018 (75.4%).

First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.

KTM 125 DUKE 17 FAQ

answers computed from the data above · terms in the glossary

Is the KTM 125 DUKE 17 reliable?

The KTM 125 DUKE 17 is more reliable than average for its class: 76.4% of its 1,892 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4134 of 5426 models.

What does a 125 DUKE 17 fail its MOT on most?

lamps and reflectors — 31% of all defects recorded against failed 125 DUKE 17 tests.

How many miles will a 125 DUKE 17 last?

The median 125 DUKE 17 shows 8,692 miles at test, and examples around 20k miles still pass 66.4% of the time — mileage alone rarely kills one.