| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 25 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Registration plate issues | 9 |
| Horn not working |1.7.3a| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Rear position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Brake component is excessively corroded |3.1.5| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Lower Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Brake pipe excessively corroded | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Brake hose damaged | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Nearside Front Direction indicators not working changed bulb |1.5.1c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Upper Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Front shock absorber seal failed and leaking oil left hand |2.3.3| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Offside Fuel system component leaking |7.2.1a| | 1 |
| Offside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Centre Rear Upper Rear reflector on motorcycle missing |1.4.1| | 1 |
| Direction indicators not working All |1.5.1c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front shock absorber seal failed and leaking oil both |2.3.3| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front Lower Front suspension assembly component loose |2.3.1| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Decelerometer brake test the less effective brake control does not achieve an efficiency of 25%. |3.3.E1b| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Nearside Rear Lower Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Nearside Rear Upper Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Central Front Upper Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Central Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Footrest insecure (6.2.12 (a)) | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |