| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 18 |
| Drive chain excessively loose |6.2.1d| | 9 |
| Steering headbearing has excessive free play |2.2.2| | 9 |
| Rear reflector on motorcycle missing |1.4.1| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Nearside Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Stop lamp not working front and back |4.3.1 |a| |ii|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Rear sprocket locking device |6.2.1h| | 1 |
| Rear Rear suspension component seized |2.4A2a|ii|| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Brake component insecure torque arm front nuts split pin missing and rear nut not fully home (1.1.21 (c)) | 1 |
| Rear Drive chain sprocket so loose it is likely to fail mounting nut not fully home (6.1.7 (c) (ii)) | 1 |
| Front shock absorber seal failed and leaking oil both |2.3.3| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Brake hose which buldges |3.2.B4| | 1 |
| Rear wheel rotation likely to be impeded due to tight drive chain |6.2.1b| | 1 |
| Nearside Wheel alignment incorrect which adversely affects the steering no gap |2.5.1| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Stop lamp not working front brake opperated |4.3.1 |a| |ii|| | 1 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear Brake back plate insecure |1.1.14 |d|| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Lower Footrest insecure |6.2.1a| | 1 |
| Lower Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded brake not releasing after application |3.2.A1h| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Front Brake lever not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Dipswitch does not operate immediately when selected on dipped beam Main beam indicator light staying on (4.1.3 (b)) | 1 |
| Fuel pipe leaking Tank fuel isolation tap to Carburettor (6.1.3 (b) (i)) | 1 |
| Exhaust has a major leak of exhaust gases exhaust broken in 2 locations |6.1.2 |a|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Drive chain sprocket carrier worn to excess carrier cush drive rubbers |6.2.1e| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Footrest missing (6.2.12 (a)) | 1 |
| Front Footrest insecure (6.2.12 (a)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Fuel pipe leaking (6.1.3 (b) (i)) | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Brake pedal attachment screws loose |3.1.2b| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Horn not working |1.7.3a| | 1 |
| Front Floor brake test indicates a severely juddering brake |3.3C2d.| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |