| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 117 |
| Registration plate issues | 84 |
| Horn not working |1.7.3a| | 54 |
| Registration plate lamp issues | 45 |
| Rear reflector on motorcycle missing |1.4.1| | 43 |
| Rear reflector missing (4.8.2 (a) (ii)) | 39 |
| Horn not working (7.7 (a) (ii)) | 35 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 23 |
| Horn not working (7.7 (a)) | 22 |
| Horn not working |7.7 |a| |ii|| | 17 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 16 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 12 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 12 |
| Front Brake excessively binding (1.2.1 (f)) | 11 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 11 |
| Rear reflector missing |4.8.2 |a| |ii|| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 9 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 8 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| 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| | 7 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 7 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 6 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 6 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 6 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 5 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| Front Horn not working |1.7.3a| | 5 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 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 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 4 |
| Horn control not functioning. |1.7.2b| | 4 |
| Horn sound not in accordance with requirements |7.7 |c|| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Front Brake excessively binding |1.2.1 |f|| | 4 |
| Rear Footrest missing |6.2.1a| | 4 |
| Offside Rear Footrest missing |6.2.12 |a|| | 4 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 4 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 4 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 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 |
| Nearside Front Footrest insecure |6.2.1a| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| All direction indicators not working (4.4.1 (a) (ii)) | 3 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Rear reflector on motorcycle obscured |1.4.2b| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 3 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 3 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |