| Most common failures | No# failures |
|---|
| Registration plate issues | 32 |
| Rear reflector on motorcycle missing |1.4.1| | 15 |
| Headlamp aim out of alignment | 14 |
| Front wheel bearings have excessive free play |2.3.5b| | 10 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Front Wheel spoke excessively loose |4.2.1b| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Registration plate lamp issues | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Rear Wheel spoke excessively loose |4.2.1b| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Horn not working |1.7.3a| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Direction indicator missing |1.5.1a| | 2 |
| Rear Direction indicator missing |1.5.1a| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear 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| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Direction indicator missing |1.5.1a| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Horn missing |1.7.1| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Lower Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Wheel spoke excessively loose |5.2.2 |d|| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Stop lamp not working rear foot |4.3.1 |a| |ii|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Lower Steering damper insecure joint |2.1.4 |d| |i|| | 1 |
| Front Brake pivot excessively worn caliper carrier bearing worn |1.1.15 |b|| | 1 |
| Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Rear wheel bearings are excessively rough Sidecar |2.4.A.2c| | 1 |
| Nearside Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Wheel fractured |5.2.2 |a|| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Position lamp switch faulty |1.1.4a| | 1 |
| Horn control not functioning. in conjunction with brake lights |1.7.2b| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Rear position lamp obscured more than 50% |1.1.1d| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Centre Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Offside Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear Wheel spoke excessively loose |5.2.2 |d|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Offside Rear Brake disc|s| insecure |3.2.A1g| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Front Headlamp missing |1.2.3a| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Wheel spoke excessively bent |4.2.1b| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Fuel tank insecure (6.1.3 (a) (i)) | 1 |
| Nearside Rear Wheel bearing rough when rotated side car (5.1.3 (b) (i)) | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Suspension component pin or bush excessively worn Lower rear suspension linkage bearings (5.3.4 (a) (i)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Valve stem seriously misaligned (5.2.3 (j)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |