| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 18 |
| Headlamp aim out of alignment | 16 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Drive chain worn to excess |6.2.1e| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Registration plate issues | 8 |
| Horn not working |1.7.3a| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 5 |
| Headlamp insecure |1.2.3b| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| 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| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Headlamp switch faulty |1.2.4| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Lower Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Nearside Front Lower Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Offside Front Lower Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Rear Lower Motorcycle structure adversely modified |6.1.1b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front All position lamps not working on idle (4.2.1 (a)) | 1 |
| Front Shock absorber has negligible damping effect To Stiff (5.3.2 (b)) | 1 |
| Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Rear All position lamps not working on Idle (4.2.1 (a)) | 1 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Front sprocket insecure |6.2.1h| | 1 |
| Rear suspension bearing has excessive free play Swing arm bearings |2.4.A2a|i|| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Front Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Stop lamp showing white light to the rear (4.3.3 (a) (ii)) | 1 |
| Position lamp showing white light to the rear (4.2.3 (a) (ii)) | 1 |
| Registration plate lamp issues | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Brake pipe inadequately supported |3.2.B2b| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Brake performance not tested |3.3| | 1 |
| Brake performance not tested |3.3| | 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 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |