| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Headlamp aim out of alignment | 14 |
| Registration plate issues | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Riders seat insecure |6.2.1a| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Horn not working |1.7.3a| | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Front position lamp does not illuminate immediately when switched on (1.1.3a) | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear reflector on motorcycle does not reflect squarely to the rear |1.4.1| | 1 |
| Rear wheel bearings are excessively tight |2.4.A.2c| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Stop lamp not working on control 1 front lever (4.3.1 (a) (ii)) | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Rear Footrest missing (6.2.1a) | 1 |
| Offside Rear Footrest missing (6.2.1a) | 1 |
| Rear Rear reflector on motorcycle missing (1.4.1) | 1 |
| 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| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Brake clevis joint insecure (1.1.15 (c)) | 1 |
| Front Motorcycle structure cracked |6.1.1a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front Brake lever mounting cracked |3.1.2c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Steering lock stop maladjusted |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 |
| Brake lever cracked |3.1.2c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Footrest missing pillion footrests missing ... dual seat fitted & no hand holds (6.2.12 (a)) | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front All position lamps not working (4.2.1 (a)) | 1 |
| Upper Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Horn missing |1.7.1| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Steering headbearing has excessive free play (2.2.2) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Rear suspension has a fracture of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Upper Direction indicators not working |1.5.1c| | 1 |
| Offside Upper Direction indicators not working |1.5.1c| | 1 |
| Centre Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort (3.3.A1d) | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Footrest missing Left (6.2.12 (a)) | 1 |
| Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Direction indicator not working r/h rear indicator (4.4.1 (a) (ii)) | 1 |
| Position lamp not working tailight (4.2.1 (a)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |