| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 20 |
| Registration plate issues | 20 |
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Rear Wheel spoke excessively loose |4.2.1b| | 5 |
| Horn not working |1.7.3a| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Registration plate lamp issues | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| 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| | 2 |
| Rear Stop lamp missing |1.3.3a| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Brake disc|s| excessively worn very thin |3.2.A1l| | 1 |
| Headlamp aim headlamp deteriorated and function impaired no image bulb faulty |1.2.3a| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Front Wheel more than one fixing loose Spindle bolts |5.2.1 |a| |ii|| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Motorcycle structure cracked |6.1.1a| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Front Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Horn missing |1.7.1| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake component cracked and seriously reduced in strength |3.2.A1| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Centre Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Throttle operating incorrectly Stiff when on full lock |6.2.1f| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |