| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 19 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Rear Brake locking device missing |3.2.A1e| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Horn not working |1.7.3a| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Offside Footrest insecure |6.2.1a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Brake locking device missing |3.2.A1e| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Front Direction indicator missing |1.5.1a| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Nearside Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Registration plate issues | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 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 Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Rear Chain guard insecure |6.2.1c| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear switch |1.3.1a| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Brake locking device insecure |3.2.A1e| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Handlebar fractured |2.1.1b| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Rear Rear wheel insecure |4.2.3b| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Rear Exhaust mounting missing |7.1.1c| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear Suspension arm insecurely attached Rear linkage bolt not into threads in nut (5.3.3 (a) (i)) | 1 |