| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 19 |
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Registration plate issues | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Wheel corroded significantly reducing the original strength |4.2.1a| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Front Wheel corroded significantly reducing the original strength |4.2.1a| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Rear Footrest insecure |6.2.1a| | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Headlamp aim beam image kick up to the offside fitted deflector |1.6| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Nearside Steering lock stop maladjusted |2.1.3| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Wheel fractured significantly reducing the original strength |4.2.1a| | 1 |
| Front Lower Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Upper Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 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 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Rear mono-shock insecure |2.4.B.4| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Wheel spoke excessively corroded |4.2.1b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake hose which buldges |3.2.B4| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Nearside Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Brake hose excessively deteriorated | 1 |
| Horn not working |1.7.3a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Offside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Nearside Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Wheel corroded to the extent that the wheel could break up (5.2.2 (c) (ii)) | 1 |
| Stop lamp not working hand control (4.3.1 (a) (ii)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Suspension arm ball joint excessively worn swinging arm bushes (5.3.4 (a) (i)) | 1 |
| Rear Wheel fixing missing (multiple fixings) rear wheel lock pins missing (5.2.1 (a) (i)) | 1 |
| Nearside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |