The picture
Cb 500 Fa-K: a strong MOT record by UK norms
Across 482 MOT tests, the Cb 500 Fa-K returns 93.4% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is brake pads worn below 1.0 mm. A non-functioning shock absorber and a binding brake round out the top three. Average tested mileage sits at 7,608, 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 lining or pad worn below 1.0mm
5 occurrences · 1.0% of tests
- 02
A shock absorber not functioning or leaking severely
4 occurrences · 0.8% of tests
- 03
Significant brake effort recorded with no brake applied indicating a binding brake
3 occurrences · 0.6% of tests
- 04
Brake efficiency below minimum requirement
2 occurrences · 0.4% of tests
- 05
A throttle control not functioning correctly
2 occurrences · 0.4% of tests
- 06
Brake fluid below minimum mark
1 occurrences · 0.2% of tests
- 07
Brake control has insufficient reserve travel
1 occurrences · 0.2% of tests
- 08
On a motorcycle with two front or rear wheels, there is no recorded brake effort at a wheel
1 occurrences · 0.2% of tests
- 09
Handlebar fractured, excessively deformed or excessively corroded
1 occurrences · 0.2% of tests
- 10
A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
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 CB 500 FA K?
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 CB 500 FA K 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.