| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 45 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 41 |
| Rear reflector on motorcycle missing |1.4.1| | 31 |
| Horn not working |1.7.3a| | 29 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 29 |
| Registration plate issues | 28 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 28 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 27 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 21 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 17 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 16 |
| Drive chain excessively loose |6.2.1d| | 13 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 13 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 12 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 12 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 11 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 11 |
| Front wheel bearings have excessive free play |2.3.5b| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 10 |
| Front wheel bearings are excessively rough |2.3.5b| | 9 |
| Throttle operating incorrectly |6.2.1f| | 9 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 8 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 8 |
| Steering headbearing has excessive free play |2.2.2| | 8 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 8 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Rear Brake disc|s| cracked |3.2.A1g| | 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| | 5 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 5 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Rear Brake cylinder leaking hydraulic fluid |3.2.B1e| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Nearside Front Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 3 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Horn not working (7.7 (a)) | 2 |
| Nearside Direction indicators not working |1.5.1c| | 2 |
| Offside Direction indicators not working |1.5.1c| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Brake performance not tested |3.3| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| An item not tested |Manual| | 2 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Offside Front Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Nearside Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear mono-shock insecure |2.4.B.4| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Rear suspension component loose |2.4.A.1a| | 2 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Offside Front Brake disc contaminated |1.1.14 |b|| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Direction indicators not working |1.5.1c| | 2 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Front position lamp missing |1.1.1a| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |