KTM 640 DUKE

625cc Petrol Class 2

#4171 of 5426 overall #197 of 230 KTMs #191 of 205 naked bikes

76.1%

first-time pass rate

11.8%

failed outright

10,076

median miles at test

862

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2017

The 640 DUKE's first-time pass rate has fallen 5.5 points since 2006, 83.3% to 77.8%.

Pass rate by mileage

how the 640 DUKE's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage 640 DUKE passes first time 79.1% of the time; by 20k that's 66.7%.

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 640 DUKE

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	94	42.5	1.7×
steering and suspension	29	13.1	1.0×
brakes	22	10	0.4×
tyres and wheels	18	8.1	1.1×
reg plates and vin	14	6.3	2.2×
drive system	13	5.9	1.1×
fuel and exhaust	13	5.9	1.8×
lamps and reflectors	8	3.6	0.5×
suspension	7	3.2	0.8×
tyres	3	1.4	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 640 DUKE 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 640 DUKE.

Pass rate by registration year

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

Best year to buy used: 2002 (80.5% pass). Weakest: 2000 (70.7%).

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 640 DUKE FAQ

answers computed from the data above · terms in the glossary

Is the KTM 640 DUKE reliable?

The KTM 640 DUKE is less reliable than average for its class: 76.1% of its 862 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #4171 of 5426 models.

What does a 640 DUKE fail its MOT on most?

lighting and signalling — 43% of all defects recorded against failed 640 DUKE tests.

What is the best year of 640 DUKE to buy used?

By first-time pass rate, 2002-registered examples do best (80.5%) and 2000 worst (70.7%). Condition and history still trump the year.

How many miles will a 640 DUKE last?

The median 640 DUKE shows 10,076 miles at test, and examples around 20k miles still pass 66.7% of the time — mileage alone rarely kills one.