| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 54 |
| Drive chain excessively loose |6.2.1d| | 28 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 25 |
| Drive chain worn to excess |6.2.1e| | 25 |
| Rear reflector on motorcycle missing |1.4.1| | 25 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 23 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 18 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Registration plate issues | 14 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 9 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Rear Wheel spoke excessively loose |4.2.1b| | 8 |
| Headlamp aim beam image kick up to the offside |1.6| | 8 |
| Drive chain excessively tight |6.2.1d| | 8 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 8 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 8 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Offside Rear Footrest missing |6.2.1a| | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear Footrest missing |6.2.1a| | 6 |
| Rear reflector on motorcycle obscured |1.4.1| | 6 |
| Rear mono-shock pivot seized |2.4.B.4| | 6 |
| Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 6 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Nearside Rear Footrest missing |6.2.1a| | 6 |
| Nearside Rear Direction indicator not working |1.5.1c| | 6 |
| Handlebar deformed |2.1.1b| | 6 |
| Offside Front Direction indicators not working |1.5.1c| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Horn not working |1.7.3a| | 5 |
| Offside Rear Direction indicator insecure |1.5.3b| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Rear Drive chain worn to excess |6.2.1e| | 5 |
| Headlamp insecure |1.2.3b| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Offside Steering lock stop ineffective |2.1.3| | 4 |
| Rear suspension component seized |2.4A2a|ii|| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Rear suspension component loose |2.4.A.1a| | 3 |
| Rear Wheel spoke missing |4.2.1b| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear Rear mono-shock pivot seized |2.4.B.4| | 3 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear Brake locking device missing |3.2.A1e| | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Nearside Front Direction indicator insecure |1.5.3b| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Offside Rear Footrest insecure |6.2.1a| | 3 |
| Front position lamp insecure |1.1.1c| | 2 |
| Rear Wheel spoke cracked. |4.2.1b| | 2 |
| Front Direction indicators not working |1.5.1c| | 2 |
| Rear Direction indicators not working |1.5.1c| | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Offside Front Steering lock stop ineffective |2.1.3| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Direction indicator insecure |1.5.3b| | 2 |
| Rear Shock absorber likely to become detached (5.3.2 (a) (ii)) | 2 |
| Rear Suspension rod ball joint likely to become detached (5.3.4 (a) (ii)) | 2 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Rear reflector on motorcycle obscured |1.4.2b| | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Brake locking device insecure |3.2.A1e| | 2 |
| Rear Drive chain sprocket so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 2 |