| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 18 |
| Headlamp aim out of alignment | 16 |
| Registration plate issues | 12 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Horn not working |1.7.3a| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Brake performance not tested |3.3| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Centre Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Front suspension assembly component loose |2.3.1| | 1 |
| Offside Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded foot brake pedal |3.2.A1h| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Offside Rear Lower Wheel spoke excessively loose |4.2.1b| | 1 |
| Front shock absorber seal failed and leaking oil both |2.3.3| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split link fitted backwards |6.2.1h| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low empty |3.2.B1d| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Steering lock stop missing |2.1.3| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Stop lamp does not illuminate immediately a brake applies Front brake light switch disconnected. |1.3.1a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Rear position lamp incorrect colour |1.1.2b| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Horn missing |1.7.1| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Registration plate lamp issues | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Suspension component pin or bush excessively worn swinging arm bearings (5.3.4 (a) (i)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted missing (6.1.7 (j) (i)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Stop lamp not working both (4.3.1 (a) (ii)) | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |