| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 72 |
| Registration plate issues | 57 |
| Headlamp aim out of alignment | 47 |
| Registration plate lamp issues | 17 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 12 |
| Rear reflector missing (4.8.2 (a) (ii)) | 10 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Horn not working |1.7.3a| | 6 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 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 reflector missing |4.8.2 |a| |ii|| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Brake hose damaged | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Nearside Front Footrest insecure |6.2.12 |a|| | 2 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 2 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 2 |
| Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Nearside Front Footrest insecure |6.2.1a| | 2 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 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 Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Horn not working (7.7 (a)) | 2 |
| Horn not working (7.7 (a)) | 2 |