| Most common failures | No# failures |
|---|
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 55 |
| Headlamp aim out of alignment | 51 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 42 |
| Steering headbearing has excessive free play |2.2.2| | 34 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 30 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 27 |
| Registration plate issues | 24 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 19 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 17 |
| Horn not working |1.7.3a| | 17 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 16 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 15 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 10 |
| Front Steering headbearing has excessive free play |2.2.2| | 10 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 9 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 9 |
| Headlamp insecure |1.2.3b| | 8 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 7 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Headlamp aim not tested |1.6| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 5 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| 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 Brake disc|s| excessively scored |3.2.A1l| | 4 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 4 |
| Front Direction indicators not working |1.5.1c| | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 4 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 4 |
| Front position lamp incorrect colour |1.1.2a| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Direction indicator not working |1.5.1c| | 3 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 3 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Rear Direction indicators not working |1.5.1c| | 3 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front Direction indicator insecure |1.5.3b| | 3 |
| Horn sounds harsh or grating |1.7.3c| | 3 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 3 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 3 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 3 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 3 |
| An item not tested |Manual| | 2 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Direction indicator incorrect colour |1.5.1b| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Exhaust has part of the system missing |7.1.1a| | 2 |
| Rear position lamp insecure |1.1.1c| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front Floor brake test indicates a severely juddering brake |3.3C2d.| | 2 |
| Centre Front Upper Steering headbearing has excessive free play |2.2.2| | 2 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 2 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Front Handlebar deformed |2.1.1b| | 2 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Front position lamp incorrect colour |1.1.2a| | 2 |
| Nearside Front Direction indicator missing |1.5.1a| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Headlamp damaged and function impaired |1.2.3a| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Stop lamp emits other than a steady red light |1.3.1b| | 2 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear Brake lever is inoperative |3.1.3c| | 2 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Rear Brake pipe inadequately supported |3.2.B2b| | 2 |