| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 214 |
| Registration plate issues | 110 |
| Horn not working |1.7.3a| | 51 |
| Rear reflector on motorcycle missing |1.4.1| | 38 |
| Registration plate lamp issues | 25 |
| Rear reflector missing (4.8.2 (a) (ii)) | 23 |
| Drive chain excessively loose |6.2.1d| | 19 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Horn not working (7.7 (a) (ii)) | 14 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Front wheel bearings have excessive free play |2.3.5b| | 10 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 9 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 8 |
| Drive chain excessively tight |6.2.1d| | 8 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| 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| | 8 |
| Rear Footrest missing |6.2.1a| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 7 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Horn not working (7.7 (a)) | 6 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 6 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Nearside Rear Footrest missing |6.2.1a| | 5 |
| Offside Rear Footrest missing |6.2.1a| | 5 |
| Horn not working |7.7 |a| |ii|| | 5 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Stop lamp remains on when the brakes are released | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 4 |
| Offside Rear Footrest missing (6.2.12 (a)) | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Front Horn not working |1.7.3a| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear mono-shock insecure |2.4.B.4| | 3 |
| Rear 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| | 3 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Rear Footrest missing |6.2.12 |a|| | 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 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 3 |
| Nearside Rear Footrest insecure |6.2.1a| | 3 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |