| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 172 |
| Registration plate issues | 92 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 33 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 30 |
| Nearside Rear Direction indicator not working |1.5.1c| | 26 |
| Offside Rear Direction indicators not working |1.5.1c| | 25 |
| Offside Rear Direction indicator not working |1.5.1c| | 24 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 24 |
| Nearside Rear Direction indicators not working |1.5.1c| | 23 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 23 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 18 |
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 16 |
| Riders seat insecure |6.2.1a| | 15 |
| Horn not working |1.7.3a| | 15 |
| Headlamp insecure |1.2.3b| | 14 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 13 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 12 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 11 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 10 |
| Indicator tell tale not functioning |1.5.2| | 9 |
| Nearside Front Direction indicator not working |1.5.1c| | 9 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Rear Position lamp not working (4.2.1 (a)) | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 8 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 7 |
| Stop lamp remains on when the brakes are released | 7 |
| Throttle operating incorrectly |6.2.1f| | 7 |
| Horn not working (7.7 (a) (ii)) | 7 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 6 |
| Brake pedal cannot be released smoothly |3.1.3d| | 6 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 6 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 6 |
| Offside Front Direction indicator not working |1.5.1c| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Rear wheel insecure |4.2.3b| | 6 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Offside Steering lock stop ineffective |2.1.3| | 6 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 6 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Rear Position lamp not working |4.2.1 |a|| | 5 |
| Front Direction indicators not working |1.5.1c| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Nearside Steering lock stop ineffective |2.1.3| | 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| | 5 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 4 |
| Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear Brake pedal is inoperative |3.1.3c| | 4 |
| Fuel system component leaking |7.2.1a| | 4 |
| Registration plate lamp issues | 4 |
| Rear Direction indicators not working |1.5.1c| | 4 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 4 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 4 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Headlamp insecure (4.1.1 (c)) | 4 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Nearside Indicator tell tale not functioning |1.5.2| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 3 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 3 |
| Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| An item not tested |Manual| | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Fuel system component insecure |7.2.1b| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Offside Rear All direction indicators not working |4.4.1 |a| |ii|| | 3 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Front Brake disc contaminated (1.1.14 (b)) | 3 |