| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 60 |
| Registration plate issues | 51 |
| Rear reflector on motorcycle missing |1.4.1| | 51 |
| Registration plate lamp issues | 19 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 17 |
| Headlamp aim beam image kick up to the offside |1.6| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 12 |
| Horn not working |1.7.3a| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Offside Rear Direction indicator not working |1.5.1c| | 5 |
| Offside Front Direction indicator not working |1.5.1c| | 5 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| 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| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Nearside Handlebar deformed |2.1.1b| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Nearside Front Brake disc|s| cracked |3.2.A1g| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Nearside Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Offside Front Brake pipe union leaking fluid |3.2.B4| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Nearside Front Footrest insecure |6.2.1a| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Brake pedal so insecure that the brake cannot be readily applied (1.1.2 (e) (ii)) | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Nearside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Rear Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |