| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 145 |
| Registration plate issues | 111 |
| Headlamp aim out of alignment | 48 |
| Registration plate lamp issues | 26 |
| Horn not working |1.7.3a| | 18 |
| Drive chain excessively loose |6.2.1d| | 14 |
| Front wheel bearings are excessively rough |2.3.5b| | 14 |
| Rear reflector missing (4.8.2 (a) (ii)) | 14 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 10 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Rear reflector missing |4.8.2 |a| |ii|| | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Rear Footrest missing |6.2.1a| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 6 |
| Front position lamp incorrect colour |1.1.2a| | 6 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 6 |
| 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| | 6 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Horn not working |7.7 |a| |ii|| | 5 |
| Direction indicators not working |1.5.1c| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 5 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Nearside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 4 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 4 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 4 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Nearside Front Position lamp not working (4.2.1 (a)) | 3 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 3 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Horn missing |1.7.1| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 2 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Rear Direction indicator obviously incorrectly positioned |4.4.3 |a|| | 2 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 2 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 2 |
| Offside Front position lamp incorrect colour |1.1.2a| | 2 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 2 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Rear position lamp insecure |1.1.1c| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Brake pedal insecure |3.1.2a| | 2 |
| Central Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Nearside Front position lamp incorrect colour |1.1.2a| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Front Valve stem seriously misaligned (5.2.3 (j)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Nearside Front Brake disc insecure (1.1.14 (a) (ii)) | 2 |