The picture
Supersport S: a strong MOT record by UK norms
Across 528 MOT tests, the Supersport S returns 89.2% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is brake efficiency below minimum requirement. Uneven braking force and brake control has insufficient reserve travel round out the top three. Average tested mileage sits at 8,193, which is the lens to read those failure rankings through. If you own one and the next test is close, the ranked list below is a sensible pre-test checklist.
Top ten reasons for rejection.
- 01
Brake efficiency below minimum requirement
6 occurrences · 1.1% of tests
- 02
Excessive fluctuation in brake effort through each wheel revolution
6 occurrences · 1.1% of tests
- 03
Brake control has insufficient reserve travel
4 occurrences · 0.8% of tests
- 04
Number plate does not conform to the specified requirements
3 occurrences · 0.6% of tests
- 05
Reflector missing or reflecting white to the rear
3 occurrences · 0.6% of tests
- 06
On a motorcycle with two front or rear wheels, there is inadequate braking effort at a wheel
2 occurrences · 0.4% of tests
- 07
On a motorcycle with two front or rear wheels, there is no recorded brake effort at a wheel
2 occurrences · 0.4% of tests
- 08
Brake efficiency below minimum requirement
1 occurrences · 0.2% of tests
- 09
Number plate inscription missing or illegible
1 occurrences · 0.2% of tests
- 10
Abnormal lag in brake operation on a wheel
1 occurrences · 0.2% of tests
Counts cover Major and Dangerous defects logged at test. Advisory items excluded so this shows why a car was rejected, not just what the tester flagged in passing.
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Picked against this car's top failure patterns. Affiliate links to Amazon UK — we earn a small cut at no cost to you. Disclosed up-front, doesn't shape the data.
Buying or keeping a Supersport S?
Use the failure ranking as a pre-test checklist or a haggling lever. Treat the headline pass rate as a fleet-wide trend, not a guarantee on any individual car.
If you own a Supersport S and your last MOT looked nothing like the ranked failures above, that's normal — individual cars vary widely. The ranking shows the patterns testers flag most often across the country.