| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 142 |
| Headlamp aim out of alignment | 93 |
| Registration plate issues | 89 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 35 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 26 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 25 |
| Drive chain excessively loose |6.2.1d| | 24 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Horn not working |1.7.3a| | 16 |
| Rear reflector missing (4.8.2 (a) (ii)) | 12 |
| Registration plate lamp issues | 12 |
| Drive chain worn to excess |6.2.1e| | 10 |
| Headlamp aim beam image kick up to the offside |1.6| | 9 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 9 |
| Rear reflector missing |4.8.2 |a| |ii|| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Riders seat insecure |6.2.1a| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 6 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 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 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Indicator tell tale not functioning |1.5.2| | 3 |
| Rear Position lamp not working |4.2.1 |a|| | 3 |
| Nearside Front Footrest insecure |6.2.1a| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Central Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Rear Direction indicator missing |1.5.1a| | 2 |
| Horn missing |1.7.1| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Drive chain fouling another component |6.2.1d| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 2 |