| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Horn not working |1.7.3a| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Registration plate issues | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Fuel tank leaking |7.2.1a| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 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 wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Front Upper Horn not working |1.7.3a| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Nearside Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Fuel cap ineffective seal perished (6.1.3 (b) (i)) | 1 |
| Brake drum insecure nut missing (1.1.14 (a) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Brake performance not tested |3.3| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Nearside Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Horn missing |1.7.1| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Brake locking device insecure insufficient threads on brake rod |3.2.A1e| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Throttle operating incorrectly not releasing (6.2.7 (a) (i)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Upper Direction indicator insecure |1.5.3b| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |