| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 161 |
| Registration plate issues | 96 |
| Rear reflector on motorcycle missing |1.4.1| | 45 |
| Horn not working |1.7.3a| | 39 |
| 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| | 36 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 36 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 31 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 30 |
| Rear Wheel spoke excessively loose |4.2.1b| | 26 |
| Headlamp aim beam image kick up to the offside |1.6| | 22 |
| Rear reflector missing (4.8.2 (a) (ii)) | 21 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 20 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 16 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 15 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 15 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 14 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 12 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 11 |
| Nearside Front Direction indicators not working |1.5.1c| | 11 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Nearside Front Direction indicator not working |1.5.1c| | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 8 |
| Direction indicators not working |1.5.1c| | 8 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 8 |
| Nearside Rear Direction indicator not working |1.5.1c| | 7 |
| Rear Wheel spoke cracked. |4.2.1b| | 7 |
| Rear Wheel spoke missing |4.2.1b| | 7 |
| Parking brake: efficiency below requirements |3.7.B.7| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 7 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 6 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 6 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 6 |
| Exhaust excessively deteriorated |7.1.1a| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Stop lamp remains on when the brakes are released | 6 |
| Front Brake excessively binding (1.2.1 (f)) | 6 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Registration plate lamp issues | 5 |
| Front Brake disc|s| cracked |3.2.A1g| | 5 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 5 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 5 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 5 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Rear Position lamp not working (4.2.1 (a)) | 5 |
| Rear Brake excessively binding (1.2.1 (f)) | 5 |
| Front position lamp incorrect colour |1.1.2a| | 4 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| All direction indicators not working |4.4.1 |a| |ii|| | 4 |
| Offside Front Footrest insecure |6.2.1a| | 4 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| 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|| | 4 |
| Seat insecure |6.2.1a| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Direction indicators not working |1.5.1c| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Horn not working (7.7 (a)) | 4 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |
| Stop lamp not working |1.2.1b| | 3 |
| Nearside Stop lamp not working |1.2.1b| | 3 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 3 |
| Centre Front Horn not working |1.7.3a| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 3 |
| Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 3 |
| Rear Seat insecure |6.2.1a| | 3 |
| Rear mono-shock insecure |2.4.B.4| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Front Direction indicators not working |1.5.1c| | 3 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Nearside Rear position lamp|s| not working |1.1.A.3b| | 3 |
| Offside Rear position lamp|s| not working |1.1.A.3b| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Service brake: efficiency below requirements |3.7.B.7| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| 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)) | 3 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |