KTM 660 S/C S/M

654cc Petrol Class 2

#3181 of 5426 overall #132 of 230 KTMs #2025 of 2787 other bikes

82.0%

first-time pass rate

7.6%

failed outright

4,669

median miles at test

695

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2008–2017

The 660 S/C S/M's first-time pass rate has fallen 23.2 points since 2008, 92.9% to 69.7%.

What fails on a 660 S/C S/M

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	67	47.2	1.1×
reg plates and vin	15	10.6	3.3×
lamps and reflectors	13	9.2	0.4×
tyres and wheels	12	8.5	0.8×
suspension	11	7.7	1.4×
steering and suspension	10	7	0.3×
brakes	5	3.5	0.2×
Identification of the vehicle	3	2.1	1.9×
audible warning (Horn)	3	2.1	2.4×
steering	3	2.1	0.7×

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 660 S/C S/M beats 2 of its 4 closest rivals (KAWASAKI ZX-6R, SUZUKI GSF600, YAMAHA FZS600).

KAWASAKI ZX-6R 78.1% pass · 174k tests SUZUKI GSF600 77.3% pass · 143k tests YAMAHA FZS600 82.6% pass · 137k tests HONDA VFR800 FI 86.7% pass · 89.4k 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 660 S/C S/M.

Pass rate by registration year

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

Best year to buy used: 2003 (86.7% pass). Weakest: 2005 (79.9%).

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 660 S/C S/M FAQ

answers computed from the data above · terms in the glossary

Is the KTM 660 S/C S/M reliable?

The KTM 660 S/C S/M is less reliable than average for its class: 82.0% of its 695 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #3181 of 5426 models.

What does a 660 S/C S/M fail its MOT on most?

lighting and signalling — 47% of all defects recorded against failed 660 S/C S/M tests.

What is the best year of 660 S/C S/M to buy used?

By first-time pass rate, 2003-registered examples do best (86.7%) and 2005 worst (79.9%). Condition and history still trump the year.