| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 119 |
| Registration plate issues | 79 |
| Headlamp aim out of alignment | 63 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 26 |
| Registration plate lamp issues | 23 |
| Rear reflector missing (4.8.2 (a) (ii)) | 18 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 15 |
| Horn not working |1.7.3a| | 13 |
| Front wheel bearings have excessive free play |2.3.5b| | 13 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 11 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 10 |
| Headlamp aim beam image kick up to the offside |1.6| | 9 |
| Stop lamp remains on when the brake is released |1.3.1e| | 9 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 6 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 6 |
| Rear Position lamp not working (4.2.1 (a)) | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Direction indicators not working |1.5.1c| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Fuel system component leaking (6.1.3 (b) (i)) | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Front Wheel spoke cracked. |4.2.1b| | 2 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Rear reflector on motorcycle missing (1.4.1) | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Direction indicator missing |1.5.1a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Horn control not functioning. |1.7.2b| | 2 |
| Drive chain fouling another component |6.2.1d| | 2 |
| Nearside Rear Direction indicator missing |1.5.1a| | 2 |
| Offside Rear Direction indicator missing |1.5.1a| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Horn missing |1.7.1| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Indicator switch insecure |1.5.4| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Rear Drive chain excessively tight |6.2.1d| | 2 |
| Front Headlamp insecure |1.2.3b| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Horn not working (1.7.3a) | 2 |