| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 65 |
| Drive chain excessively loose |6.2.1d| | 39 |
| Rear reflector on motorcycle missing |1.4.1| | 34 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 31 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 23 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 21 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 17 |
| Registration plate issues | 13 |
| Rear reflector on motorcycle obscured |1.4.1| | 13 |
| Drive chain worn to excess |6.2.1e| | 12 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 10 |
| Headlamp aim beam image kick up to the offside |1.6| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 10 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 9 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 9 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 8 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 8 |
| Throttle operating incorrectly |6.2.1f| | 8 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 7 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 7 |
| Riders seat insecure |6.2.1a| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 6 |
| Rear Drive chain excessively loose |6.2.1d| | 5 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| 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| | 5 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Front Brake disc|s| cracked |3.2.A1g| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Horn not working |1.7.3a| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear Brake locking device missing |3.2.A1e| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Nearside Front Footrest insecure |6.2.1a| | 3 |
| Rear position lamp damaged and function impaired |1.1.1b| | 3 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Brake locking device missing |3.2.A1e| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Rear reflector on sidecar missing |1.4.1| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Indicator switch insecure |1.5.4| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Brake hose damaged | 2 |
| Nearside Rear Lower Drive chain excessively loose |6.2.1d| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Indicator switch defective |1.5.4| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Brake master cylinder fluid level dangerously low |3.2.B1d| | 2 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear Wheel spoke excessively corroded |4.2.1b| | 2 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |