| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 285 |
| Registration plate issues | 237 |
| Headlamp aim out of alignment | 171 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 50 |
| Registration plate lamp issues | 40 |
| 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| | 35 |
| Drive chain excessively loose |6.2.1d| | 30 |
| Rear reflector missing (4.8.2 (a) (ii)) | 27 |
| Headlamp aim beam image kick up to the offside |1.6| | 22 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 18 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 16 |
| Horn not working |1.7.3a| | 15 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 15 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 15 |
| Rear reflector missing |4.8.2 |a| |ii|| | 13 |
| Steering headbearing has excessive free play |2.2.2| | 13 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Nearside Rear Direction indicator not working |1.5.1c| | 11 |
| Nearside Front Direction indicator not working |1.5.1c| | 11 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 11 |
| Nearside Rear Direction indicators not working |1.5.1c| | 11 |
| Drive chain worn to excess |6.2.1e| | 11 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 10 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 10 |
| Offside Rear Direction indicator not working |1.5.1c| | 10 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 9 |
| Direction indicators not working |1.5.1c| | 9 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Throttle operating incorrectly |6.2.1f| | 9 |
| Drive chain excessively tight |6.2.1d| | 9 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 8 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Offside Front Direction indicators not working |1.5.1c| | 6 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 6 |
| Offside Front Footrest insecure |6.2.1a| | 6 |
| Rear Brake disc|s| cracked |3.2.A1g| | 6 |
| Offside Rear Direction indicators not working |1.5.1c| | 6 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 6 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Front position lamp incorrect colour |1.1.2a| | 6 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 6 |
| 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 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 5 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 5 |
| Nearside Front Direction indicators not working |1.5.1c| | 5 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 5 |
| Front Brake excessively binding (1.2.1 (f)) | 5 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 5 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 4 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 4 |
| Offside Footrest insecure |6.2.1a| | 4 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Front Steering headbearing has excessive free play |2.2.2| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Rear Direction indicator not working |1.5.1c| | 4 |
| Nearside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Rear Brake fluid contaminated |1.8 |a|| | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 4 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 4 |