KTM DUKE 620

609cc Petrol Class 2

#4108 of 5426 overall #189 of 230 KTMs #186 of 205 naked bikes

76.6%

first-time pass rate

12.0%

failed outright

11,399

median miles at test

859

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2021

The DUKE 620's first-time pass rate has fallen 9.7 points since 2006, 87.1% to 77.4%.

Pass rate by mileage

how the DUKE 620's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage DUKE 620 passes first time 80.6% of the time; by 20k that's 76.6%.

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 DUKE 620

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	133	50	1.9×
steering and suspension	28	10.5	0.8×
reg plates and vin	28	10.5	3.9×
lamps and reflectors	25	9.4	1.1×
brakes	16	6	0.3×
tyres and wheels	13	4.9	0.6×
drive system	10	3.8	1.5×
fuel and exhaust	7	2.6	0.9×
Identification of the vehicle	3	1.1	1.5×
structure and attachments	3	1.1	0.5×

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 DUKE 620 beats 0 of its 4 closest rivals (HONDA CB500, TRIUMPH STREET TRIPLE, HONDA CB600 HORNET).

HONDA CB500 83.3% pass · 105k tests TRIUMPH STREET TRIPLE 87.7% pass · 37.7k tests HONDA CB600 HORNET 78.6% pass · 26.4k tests TRIUMPH STREET TRIPLE R 87.7% pass · 20.6k 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 DUKE 620.

Pass rate by registration year

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

Best year to buy used: 1997 (82.1% pass). Weakest: 1998 (73.0%).

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 DUKE 620 FAQ

answers computed from the data above · terms in the glossary

Is the KTM DUKE 620 reliable?

The KTM DUKE 620 is less reliable than average for its class: 76.6% of its 859 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #4108 of 5426 models.

What does a DUKE 620 fail its MOT on most?

lighting and signalling — 50% of all defects recorded against failed DUKE 620 tests.

What is the best year of DUKE 620 to buy used?

By first-time pass rate, 1997-registered examples do best (82.1%) and 1998 worst (73.0%). Condition and history still trump the year.

How many miles will a DUKE 620 last?

The median DUKE 620 shows 11,399 miles at test, and examples around 20k miles still pass 76.6% of the time — mileage alone rarely kills one.