| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 15 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear suspension component seized |2.4A2a|ii|| | 2 |
| Rear Brake pedal is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Horn not working |1.7.3a| | 2 |
| Rear Brake disc|s| cracked |3.2.A1g| | 2 |
| Nearside Front shock absorber seal failed and leaking oil (2.3.3) | 2 |
| Riders seat insecure (6.2.1a) | 2 |
| Front Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Registration plate issues | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Direction indicators not working |1.5.1c| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Rear Drive belt guard insecure |6.2.1c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Headlamp dipped beam affected by the operation of another lamp (1.2.2c) | 1 |
| Rear reflector on motorcycle missing (1.4.1) | 1 |
| Rear suspension bearing has excessive free play (2.4.A2a(i)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.5.1) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.5.1) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Drive chain excessively tight (6.2.1d) | 1 |
| Rear wheel spindle securing nut(s) loose (2.4.A.2b) | 1 |
| Front wheel bearings have excessive free play (2.3.5b) | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Headlamp insecure bulb |1.2.3b| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| An item not tested |Manual| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Nearside Footrest missing |6.2.1a| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| 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| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Brake pedal is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Nearside Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Direction indicator missing |1.5.1a| | 1 |
| Offside Direction indicator missing |1.5.1a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |