KTM 125 DUKE

125cc Petrol Class 1

#4859 of 5426 overall #228 of 230 KTMs #202 of 205 naked bikes

67.9%

first-time pass rate

21.4%

failed outright

11,660

median miles at test

1,381

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2014–2025

The 125 DUKE's first-time pass rate has fallen 12.6 points since 2014, 69.1% to 56.5%.

Pass rate by mileage

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

A low-mileage 125 DUKE passes first time 73.5% of the time; by 30k that's 56.8%.

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

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	189	23.5	1.9×
brakes	133	16.5	1.8×
lamps and reflectors	102	12.7	3.6×
steering and suspension	87	10.8	1.5×
structure and attachments	85	10.6	5.6×
suspension	52	6.5	3.9×
steering	51	6.3	6.4×
drive system	48	6	3.6×
tyres and wheels	34	4.2	1.1×
body and structure	23	2.9	2.7×

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 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.

Pass rate by registration year

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

Best year to buy used: 2011 (68.3% pass). Weakest: 2012 (66.7%).

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 FAQ

answers computed from the data above · terms in the glossary

Is the KTM 125 DUKE reliable?

The KTM 125 DUKE is less reliable than average for its class: 67.9% of its 1,381 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4859 of 5426 models.

What does a 125 DUKE fail its MOT on most?

lighting and signalling — 24% of all defects recorded against failed 125 DUKE tests.

How many miles will a 125 DUKE last?

The median 125 DUKE shows 11,660 miles at test, and examples around 30k miles still pass 56.8% of the time — mileage alone rarely kills one.