| Most common failures | No# failures |
|---|
| Registration plate issues | 17 |
| Rear reflector on motorcycle missing |1.4.1| | 12 |
| Horn missing |1.7.1| | 6 |
| Headlamp aim out of alignment | 6 |
| Horn not working |1.7.3a| | 5 |
| Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 2 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Wheel spoke cracked. Two spokes broken |4.2.1b| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Wheel spindle locking device ineffective Incorrect locking block (5.2.1 (d)) | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Horn sound not in accordance with requirements harsh (7.7 (c)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Offside Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp when main beam is selected |1.1.3b| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Rear reflector likely to become detached (4.8.1 (b) (ii)) | 1 |
| Nearside Front Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Offside Front Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Rear Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Exhaust has part of the system missing |7.1.1a| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Rear Wheel spoke excessively corroded several spokes |4.2.1b| | 1 |
| Central Front Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Nearside Rear Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Brake disc insecure (1.1.14 (a) (ii)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Rear Brake component modification unsafe |1.1.21 |d| |i|| | 1 |
| Front brake disc in such a condition that it is seriously weakened | 1 |
| Steering headbearing has excessive wear or free play Freeplay |2.2.2 |f| |i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Drive chain excessively loose |6.2.1d| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Lower Suspension attachment bracket/mounting insecure (5.3.3 (a) (i)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Fuel cap leaking (6.1.3 (b) (i)) | 1 |