| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 11 |
| Steering headbearing has excessive free play |2.2.2| | 8 |
| Registration plate issues | 6 |
| Horn not working |1.7.3a| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Brake hose excessively deteriorated | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Steering lock stop missing |2.1.3| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Fuel cap/sealing device sealing washer missing |7.2.4c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Nearside Rear Motorcycle structure cracked |6.1.1a| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Headlamp switch insecure |1.2.4| | 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 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Fuel cap/sealing device ineffective (6.1.3 (b) (i)) | 1 |
| Battery insecure and likely to fall from carrier (4.13 (a) (ii)) | 1 |
| Fuel cap/sealing device does not fasten securely maintaining the sealing arrangement |7.2.4b| | 1 |
| Centre Headlamp aim beam image kick up to the offside |1.8| | 1 |
| Centre Stop lamp not working |1.2.1b| | 1 |
| Offside Steering pivot point has excessive play |2.2.B.1g| | 1 |
| Nearside Steering pivot point has excessive play |2.2.B.1g| | 1 |
| Offside Front Front wheel bearing has excessive play |2.5.A.3c| | 1 |
| Horn not a constant note |1.7.1e| | 1 |
| Horn not a continuous or uniform sound |1.6.2e| | 1 |
| Brake performance not tested |3.7.A.1| | 1 |
| Service brake: efficiency below requirements |3.7.C.1a| | 1 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.8| | 1 |
| Nearside front brake recording little or no effort |3.7.B.5a| | 1 |
| Offside front brake recording little or no effort |3.7.B.5a| | 1 |
| Nearside Front Trikes, quads or pre-68 vehicles, service brake efficiency below requirements |3.7.C.1a| | 1 |
| Offside Front Trikes, quads or pre-68 vehicles, service brake efficiency below requirements |3.7.C.1a| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |