| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 8 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Registration plate lamp issues | 2 |
| Nearside Front Engine mounting/bracket excessively loose (6.1.8 (a) (ii)) | 1 |
| Offside Front Engine mounting/bracket excessively loose (6.1.8 (a) (ii)) | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Offside Front Brake lever is so short that the brake cannot be readily applied |1.1.2 |d|| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Front Stop lamp not working lever switch |4.3.1 |a| |ii|| | 1 |
| Offside Front Direction indicator not working wiring behind fairing |4.4.1 |a| |ii|| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Horn not working |1.7.3a| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Position lamp switch insecure kill switch/ starter button |1.1.4b| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Nearside Front Upper Direction indicator not working |1.5.1c| | 1 |
| Rear Brake master cylinder insecure (1.1.10 (c)) | 1 |
| Nearside Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls front brake light switch not working (4.3.2 (a) (iii)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected |1.1.2 |b| |ii|| | 1 |
| Stop lamp not working when front brake is applied |4.3.1 |a| |ii|| | 1 |
| Rear 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)) | 1 |