| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 30 |
| Registration plate issues | 27 |
| Headlamp aim out of alignment | 24 |
| Horn not working |1.7.3a| | 17 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 14 |
| Rear Wheel spoke excessively loose |4.2.1b| | 12 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Horn missing |1.7.1| | 5 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Horn control not functioning. |1.7.2b| | 3 |
| Front Wheel spoke missing |4.2.1b| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear reflector on sidecar missing |1.4.1| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Registration plate lamp issues | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 2 |
| Front position lamp missing |1.1.1a| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 2 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Wheel bearing play so excessive that directional control is impaired |5.1.3 |a| |ii|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Position lamp missing |4.2.1 |a|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Centre Rear Rear wheel spindle loose |2.4.A.2b| | 1 |
| Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort Rear |3.3.A1c| | 1 |
| Brake component modification unsafe Rear |1.1.21 |d| |i|| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear suspension has a fracture of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Nearside Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Central Rear Upper Rear reflector on motorcycle missing |1.4.1| | 1 |
| Centre Rear Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Headlamp aim projected beam image obviously incorrect Kick up incorrect direction (4.1.2 (c)) | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Lower Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp aim not tested front light not working |1.6| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls Brake lever switch not working (4.3.2 (a) (iii)) | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 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 |
| Direction indicator missing |1.5.1a| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Brake performance not tested |3.3| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| An item not tested |Manual| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Front Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Position lamp showing white light to the rear (4.2.3 (a) (ii)) | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired bulb fitted incorrectly |1.2.3a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Steering operation linkage fouling when handlebars turned from lock to lock stop lock bolt missing |2.1.4 |a|| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |