| Most common failures | No# failures |
|---|
| Registration plate issues | 47 |
| Rear reflector on motorcycle missing |1.4.1| | 27 |
| Rear reflector missing (4.8.2 (a) (ii)) | 16 |
| Headlamp aim out of alignment | 15 |
| Horn not working |1.7.3a| | 13 |
| Horn missing |1.7.1| | 10 |
| Horn not working (7.7 (a) (ii)) | 10 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Stop lamp remains on when the brakes are released | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Front Position lamp not working (4.2.1 (a)) | 5 |
| Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Registration plate lamp issues | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 2 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Decelerometer brake test indicates a binding brake |3.3.E1d| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 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 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Wheel hub excessively worn |5.2.1 |b| |i|| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Nearside Footrest insecure Foot rest securing split pin missing (6.2.12 (a)) | 1 |
| Offside Footrest insecure Foot rest securing split pin missing (6.2.12 (a)) | 1 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear suspension bearing excessively deteriorated lower shock bearing |2.4A.2a|i|| | 1 |
| Horn not working wire loose |1.7.3a| | 1 |
| Rear Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 1 |
| Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear reflector on motorcycle missing (1.4.1) | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Nearside Front Lower Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Offside Front Lower Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Nearside Rear Lower Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Offside Rear Lower Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Central Front Upper Horn not working (7.7 (a) (ii)) | 1 |
| Central Rear Upper Position lamp not working (4.2.1 (a)) | 1 |
| Offside Front Upper Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Lower Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Central Front Upper Horn control not functioning. |1.7.2b| | 1 |
| Central Front Outer Headlamp aim not tested |1.6| | 1 |
| Central Front Upper Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Lower Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Rear Lower Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Central Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Stop lamp not working lever |4.3.1 |a| |ii|| | 1 |
| Stop lamp not working pedal |4.3.1 |a| |ii|| | 1 |
| Rear Rear suspension bush has excessive free play top leakage bush worn |2.4.A2a|i|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Wheel fractured (5.2.2 (a)) | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Front Suspension component modified so the suspension is inoperative |5.3.3 |c| |ii|| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Front Stop lamp not working lever (4.3.1 (a) (ii)) | 1 |
| Rear Suspension component modified so the suspension is inoperative (5.3.3 (c) (ii)) | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Retaining clip for split link |6.2.1h| | 1 |
| Nearside Footrest insecure (6.2.12 (a)) | 1 |
| Offside Footrest insecure (6.2.12 (a)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Wheel fixing loose (single fixing) (5.2.1 (a) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front shock absorber seal failed and leaking oil Both |2.3.3| | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Rear Brake fluid contaminated (1.8 (a)) | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Horn not working (1.7.3a) | 1 |
| Front wheel bearings have excessive free play (2.3.5b) | 1 |
| Drive chain excessively loose (6.2.1d) | 1 |
| Headlamp aim not tested DIP AND MAIN BEAM ON AT SAME TIME (4.1.2 (b)) | 1 |
| Stop lamp not working Front and Rear Controls (4.3.1 (a) (ii)) | 1 |
| Shock absorber has a serious fluid leak Both Front Fork Seals (5.3.2 (b)) | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease from fork leak |3.2.A1k| | 1 |
| All position lamps not working (4.2.1 (a)) | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Rear Wheel fixing loose |single fixing| |5.2.1 |a| |ii|| | 1 |
| All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear reflector on sidecar incorrectly positioned |1.4.2d| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Horn not working (7.7 (a)) | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Vehicle identification number not legible |0.2 |b|| | 1 |
| Rear Wheel spoke excessively loose |5.2.2 |d|| | 1 |
| Throttle operating incorrectly throttle not returning correctly (6.2.7 (a) (i)) | 1 |
| Front Brake caliper inadequately mounted (1.1.16 (c) (i)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Stop lamp not working both (4.3.1 (a) (ii)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Offside Front Horn not working broken wiring |7.7 |a| |ii|| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Nearside Footrest insecure stiff (6.2.12 (a)) | 1 |