| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 10 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear mono-shock pivot seized |2.4.B.4| | 2 |
| Registration plate lamp issues | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Horn not working |1.7.3a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride circlip missing |6.2.1h| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Direction indicator insecure |1.4.A.2b| | 1 |
| Parking brake not fitted on at least one wheel on a 3 wheeled vehicle |3.1.1| | 1 |
| Brake master cylinder leaking hydraulic fluid |3.6.G.1f| | 1 |
| Parking brake: efficiency below requirements |3.7.B.7| | 1 |
| Front front brake binding |3.7.B.1| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Exhaust has a major leak of exhaust gases collector box |6.1.2 |a|| | 1 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear suspension component seized |2.4A2a|ii|| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Centre Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Brake fluid reservoir fluid not visible (1.1.10 (d) (iii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Steering movement excessively notchy with the weight on the lower bearing (2.2.1a) | 1 |
| 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) | 1 |
| Handlebar mounting insecure (2.2.1 (a) (i)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Throttle operating incorrectly loose switch (6.2.7 (a) (i)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Rear Suspension arm attachment bracket/mounting insecure Rear swingarm bolt loose. Tightened after test. (5.3.3 (a) (i)) | 1 |
| Central Rear Suspension component modified so the suspension is inoperative Suspension not rebounding when depressed. (5.3.3 (c) (ii)) | 1 |