| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 47 |
| Registration plate issues | 43 |
| Rear reflector on motorcycle missing |1.4.1| | 33 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 14 |
| Stop lamp remains on when the brake is released |1.3.1e| | 14 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 11 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| 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| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Horn not working |1.7.3a| | 8 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 8 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 7 |
| Front wheel bearings are excessively rough |2.3.5b| | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Centre Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Position lamp switch faulty |1.1.4a| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Registration plate lamp issues | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Brake locking device insecure |3.2.A1e| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Front Brake reaction bracket insecure |3.2.A1j| | 2 |
| Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Offside Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Centre Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |