| Most common failures | No# failures |
|---|
| Registration plate issues | 81 |
| Rear reflector on motorcycle missing |1.4.1| | 37 |
| Horn not working |1.7.3a| | 25 |
| Horn missing |1.7.1| | 19 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 12 |
| Rear Wheel spoke excessively loose |4.2.1b| | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 10 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Headlamp aim out of alignment | 8 |
| Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Wheel spoke excessively loose |4.2.1b| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Front Horn not working |1.7.3a| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Registration plate lamp issues | 3 |
| Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Horn sound not in accordance with requirements (7.7 (c)) | 2 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Brake disc|s| securing bolt|s| loose |3.2.A1g| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear 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 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front Fuel hose leaking |7.2.1a| | 2 |
| Front Horn control defective |1.7.2a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Roller brake test No brake control achieves an efficiency of 30% (1.2.2 (a) (i)) | 1 |
| Front Stop lamp not working Control (4.3.1 (a) (ii)) | 1 |
| Rear Stop lamp missing Control (4.3.1 (a) (ii)) | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Horn control not readily accesible. |1.7.2a| | 1 |
| Rear Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Rear Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 1 |
| Wheel spoke excessively loose rear wheel (5.2.2 (d)) | 1 |
| Central Rear Lower Suspension arm pin or bush excessively worn lower swinging arm (5.3.4 (a) (i)) | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Rear Wheel spoke excessively loose |5.2.2 |d|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Shock absorber has a serious fluid leak both fork oil seals failed (5.3.2 (b)) | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Central Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Central Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Central Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Front Horn missing |1.7.1| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Drive chain sprocket excessively loose all bolts loose (6.1.7 (c) (i)) | 1 |
| Wheel fractured significantly reducing the original strength Front. |4.2.1a| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Handlebar handgrip not secure to handlebars. left |2.1.1c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 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 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Upper Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Front Upper Horn not working |1.7.3a| | 1 |
| Offside Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Central Front Upper Horn not working (7.7 (a)) | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front position lamp obscured more than 50% |1.1.1d| | 1 |
| Nearside Front Position lamp switch insecure |1.1.4b| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front shock absorber seal failed and leaking oil R/H |2.3.3| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Lower Drive chain fouling another component |6.2.1d| | 1 |
| Decelerometer brake test the less effective brake control does not achieve an efficiency of 25%. |3.3.E1b| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Headlamp light intensity severely reduced earth wire probably in incorrect position on bulb (4.1.4 (a)) | 1 |
| Rear Wheel spoke excessively loose at least two spokes loose (5.2.2 (d)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted fish always swims up stream (6.1.7 (j) (i)) | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Rear Wheel spoke excessively bent |4.2.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride joining link facing wrong direction |6.2.1h| | 1 |
| Rear Wheel damaged significantly reducing the original strength distorted and spokes loose which has seriously worn wheel |4.2.1a| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Central Rear Stop lamp not working stop lamp switch adjusted |4.3.1 |a| |ii|| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Central Front Horn not working (7.7 (a) (ii)) | 1 |
| Shock absorber has a serious fluid leak both fronts (5.3.2 (b)) | 1 |
| Central Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Centre Front Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Centre Rear Upper Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |