| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 264 |
| Registration plate issues | 67 |
| Rear reflector on motorcycle missing |1.4.1| | 66 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 44 |
| Drive chain excessively loose |6.2.1d| | 33 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 21 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 19 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 15 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 15 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Horn not working |1.7.3a| | 13 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 11 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 10 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 10 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 9 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 9 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 8 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 8 |
| Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Throttle operating incorrectly |6.2.1f| | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 6 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 6 |
| Front position lamp incorrect colour |1.1.2a| | 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 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 6 |
| Rear Drive chain excessively loose |6.2.1d| | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Horn not working (7.7 (a)) | 5 |
| Indicator switch insecure |1.5.4| | 5 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 5 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Offside Rear Footrest missing |6.2.1a| | 4 |
| Nearside Front Footrest insecure |6.2.1a| | 4 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 4 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |