| Most common failures | No# failures |
|---|
| Registration plate issues | 48 |
| Rear reflector on motorcycle missing |1.4.1| | 39 |
| Headlamp aim out of alignment | 16 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 12 |
| Front wheel bearings have excessive free play |2.3.5b| | 12 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Horn not working |1.7.3a| | 9 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Shock absorber has a serious fluid leak fork legs (5.3.2 (b)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Rear suspension bearing has excessive free play lower bearing |2.4.A2a|i|| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Horn missing |1.7.1| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Rear Rear position lamp missing |1.1.1a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Registration plate lamp issues | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Central Rear Upper Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Fuel hose insecure |6.1.3 |a| |i|| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Footrest missing |6.2.1a| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Centre Front Lower Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Centre Front Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Front Wheel spoke excessively loose |5.2.2 |d|| | 1 |
| Rear Valve stem seriously misaligned |5.2.3 |j|| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front wheel bearings have excessive free play COLLAPSED |2.3.5b| | 1 |
| Handlebar mounting clamp loose risers loose on yoke |2.1.1a| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |