| Most common failures | No# failures |
|---|
| Registration plate issues | 55 |
| Headlamp aim out of alignment | 54 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 24 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 23 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 16 |
| 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| | 14 |
| Drive chain excessively loose |6.2.1d| | 13 |
| Rear reflector on motorcycle missing |1.4.1| | 12 |
| Drive chain worn to excess |6.2.1e| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Horn not working |1.7.3a| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Throttle operating incorrectly |6.2.1f| | 9 |
| Registration plate lamp issues | 8 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Horn not working |7.7 |a| |ii|| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Front Brake disc|s| cracked |3.2.A1g| | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear Brake locking device missing |3.2.A1e| | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 2 |
| Exhaust has part of the system missing |7.1.1a| | 2 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|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 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Brake locking device missing |3.2.A1e| | 2 |
| An item not tested |Manual| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Parking brake not fitted on at least one wheel on a 3 wheeled vehicle |3.1.1| | 2 |
| Parking brake is not capable of being maintained in operation by direct mechanical action only |3.1.2| | 2 |