| Most common failures | No# failures |
|---|
| Registration plate issues | 134 |
| Rear reflector on motorcycle missing |1.4.1| | 130 |
| Headlamp aim out of alignment | 67 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 44 |
| Horn not working |1.7.3a| | 38 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 36 |
| Front wheel bearings have excessive free play |2.3.5b| | 36 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 34 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 31 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 15 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 15 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 15 |
| Front wheel bearings are excessively rough |2.3.5b| | 13 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Drive chain worn to excess |6.2.1e| | 12 |
| Rear Wheel spoke excessively loose |4.2.1b| | 11 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 10 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 10 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Horn missing |1.7.1| | 9 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| 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| | 6 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Direction indicators not working |1.5.1c| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 4 |
| Front Horn not working |1.7.3a| | 4 |
| Fuel cap sealing washer missing |7.2.2c| | 4 |
| Registration plate lamp issues | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Headlamp aim not tested (4.1.2 (b)) | 4 |
| Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Rear position lamp incorrect colour |1.1.2b| | 3 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear reflector on motorcycle missing (1.4.1) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| An item not tested |Manual| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Wheel spoke missing |4.2.1b| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Front Wheel spoke cracked. |4.2.1b| | 2 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Offside Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 2 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Drive chain fouling another component |6.2.1d| | 2 |
| Nearside Rear Direction indicator missing |1.5.1a| | 2 |
| Offside Rear Direction indicator missing |1.5.1a| | 2 |
| Rear Wheel fractured significantly reducing the original strength |4.2.1a| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Centre Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Handlebar handgrip missing |2.1.1c| | 2 |
| Offside Steering lock stop missing |2.1.3| | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Horn not working (7.7 (a)) | 2 |