| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 12 |
| Registration plate issues | 7 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Horn not working |1.7.3a| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Direction indicator missing |1.5.1a| | 3 |
| Offside Steering lock stop missing |2.1.3| | 3 |
| Nearside Steering lock stop missing |2.1.3| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Nearside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 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 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Offside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Brake hose excessively deteriorated | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Upper Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 1 |
| Front Upper Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Brake drum|s| cracked |3.2.A1g| | 1 |
| Front shock absorber seal failed and leaking oil l/h fork |2.3.3| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Fork yoke fractured |2.1.1b| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Horn emits 2 or more alternating tones |1.7.3b| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Steering lock stop missing |2.1.3| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Centre Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Front shock absorber seal failed and leaking oil r/h fork |2.3.3| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Offside Rear Upper Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |
| Central Front Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Central Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Central Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |