| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 145 |
| Registration plate issues | 97 |
| Rear reflector on motorcycle missing |1.4.1| | 55 |
| Horn not working |1.7.3a| | 49 |
| Registration plate lamp issues | 37 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 25 |
| Horn not working (7.7 (a)) | 24 |
| Rear reflector missing (4.8.2 (a) (ii)) | 23 |
| Horn not working (7.7 (a) (ii)) | 21 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Horn not working |7.7 |a| |ii|| | 18 |
| Drive chain excessively loose |6.2.1d| | 17 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 16 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 15 |
| Rear reflector missing |4.8.2 |a| |ii|| | 13 |
| Headlamp aim beam image kick up to the offside |1.6| | 11 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 10 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 9 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 9 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 9 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 9 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 9 |
| Front Horn not working |1.7.3a| | 9 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 7 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 6 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 6 |
| Front Horn not working |7.7 |a| |ii|| | 6 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 6 |
| Nearside Rear Direction indicators not working |1.5.1c| | 6 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Front Brake excessively binding (1.2.1 (f)) | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| 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|| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| 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)) | 4 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 4 |
| 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| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 3 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Horn control not functioning. |1.7.2b| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Horn sound not in accordance with requirements (7.7 (c)) | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |