| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 126 |
| Rear reflector on motorcycle missing |1.4.1| | 71 |
| Registration plate issues | 40 |
| Horn not working |1.7.3a| | 35 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 28 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 26 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 20 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 18 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 15 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 13 |
| Steering headbearing has excessive free play |2.2.2| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 11 |
| Exhaust excessively deteriorated |7.1.1a| | 11 |
| Rear reflector missing (4.8.2 (a) (ii)) | 11 |
| Headlamp aim beam image kick up to the offside |1.6| | 10 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 10 |
| Throttle operating incorrectly |6.2.1f| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 7 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Rear Wheel spoke excessively loose |4.2.1b| | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Rear parking brake recording little or no effort | 6 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Headlamp insecure |1.2.3b| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Offside Rear Direction indicators not working |1.5.1c| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Horn not working |7.7 |a| |ii|| | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Front Wheel spoke excessively loose |4.2.1b| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 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 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Front Brake disc|s| cracked |3.2.A1g| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Rear brake binding | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |