| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 28 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 17 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 15 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 14 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 7 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Registration plate issues | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Headlamp insecure |1.2.3b| | 5 |
| Handlebar mounting clamp loose |2.1.1a| | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Exhaust excessively deteriorated |7.1.1a| | 4 |
| Horn not working |1.7.3a| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Rear Brake lever mounting insecure |3.1.2a| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Offside Rear Direction indicator insecure |1.5.3b| | 3 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Offside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Horn is not continous or uniform |1.7.3c| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Offside Rear Direction indicator likely to become detached hanging on wiring (4.4.1 (c) (ii)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Offside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Nearside Front Brake lever insecure |3.1.2a| | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 2 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Stop lamp affected by the operation of the horn |1.3.2| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Brake lever insecure |3.1.2a| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Rear Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Brake hose damaged | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Steering headbearing excessively stiff or notchy steering bearings too tight and notchy (2.2.2 (f) (i)) | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 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 |
| Nearside Front Direction indicator affected by the operation of another lamp (1.5.1c) | 1 |
| Offside Front Direction indicator affected by the operation of another lamp (1.5.1c) | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp (1.5.1c) | 1 |
| Offside Rear Direction indicator affected by the operation of another lamp (1.5.1c) | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Central Vehicle identification number not displayed (0.2 (a)) | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 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 |
| Front Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Nearside Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Offside Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Nearside Handlebar so insecure it is likely to become detached control grip loose (2.2.1 (b) (ii)) | 1 |
| Front Brake component is fractured |3.1.5| | 1 |
| Nearside Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Offside Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Brake rod excessively corroded |3.2.A1c| | 1 |
| Nearside Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Front Upper Brake lever attachment screws loose |3.1.2b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Brake performance not tested |3.3| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Vehicle identification number not permanently displayed |6.3.5a| | 1 |
| Rear Brake lever insecure |3.1.2a| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 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 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Rear Brake lever attachment screws loose |3.1.2b| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Floor brake test indicates a severely juddering brake |3.3C2d.| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Front Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Nearside Front Upper Direction indicators not working |1.5.1c| | 1 |
| Offside Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Rear Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Lower Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Front Lower Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Throttle operating incorrectly cannot be applied smoothly |6.2.1f| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Motorcycle structure adversely modified |6.1.1b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Nearside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Inner Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Outer Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Centre Front position lamp missing |1.1.1a| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Brake component is fractured |3.1.5| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |