| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 95 |
| Rear reflector missing (4.8.2 (a) (ii)) | 54 |
| Registration plate issues | 53 |
| Rear reflector on motorcycle missing |1.4.1| | 46 |
| Registration plate lamp issues | 32 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 19 |
| Rear reflector missing |4.8.2 |a| |ii|| | 17 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Horn not working (7.7 (a)) | 14 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 13 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 13 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 10 |
| Horn not working (7.7 (a) (ii)) | 8 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 8 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 8 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Front Brake excessively binding (1.2.1 (f)) | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 6 |
| Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Horn not working |7.7 |a| |ii|| | 5 |
| Horn not working |1.7.3a| | 5 |
| Rear Footrest missing (6.2.12 (a)) | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Front Horn not working (7.7 (a)) | 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 reflector on motorcycle incorrectly positioned |1.4.2d| | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 3 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 3 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| 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 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 2 |
| Offside Rear Footrest missing (6.2.12 (a)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Steering headbearing in such a condition that steering control is adversely affected notchy |2.2.2 |f| |ii|| | 2 |
| Handlebar mounting insecure (2.2.1 (a) (i)) | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Offside Front Position lamp not working (4.2.1 (a)) | 2 |
| Central Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Steering headbearing excessively stiff or notchy notchy (2.2.2 (f) (i)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Front Brake hose excessively twisted (1.1.12 (b) (ii)) | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |