| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 106 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 47 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 38 |
| Rear reflector on motorcycle missing |1.4.1| | 28 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 25 |
| Front wheel bearings have excessive free play |2.3.5b| | 25 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 23 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 22 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 21 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 18 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 15 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 14 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Registration plate issues | 13 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 12 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Front wheel bearings are excessively rough |2.3.5b| | 11 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 11 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 10 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 10 |
| Front Position lamp not working (4.2.1 (a)) | 10 |
| Front Brake excessively binding (1.2.1 (f)) | 10 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 9 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Steering headbearing has excessive free play |2.2.2| | 9 |
| Horn not working |1.7.3a| | 9 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 9 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 9 |
| Offside Front Direction indicator not working |1.5.1c| | 8 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 8 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Rear Brake disc|s| cracked |3.2.A1g| | 7 |
| Front suspension has inadequate damping effect. |2.3.6c| | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Exhaust excessively deteriorated |7.1.1a| | 7 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 7 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 7 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 6 |
| Rear Brake excessively binding (1.2.1 (f)) | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Nearside Front Direction indicator not working |1.5.1c| | 5 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 5 |
| Horn not working (7.7 (a)) | 5 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Nearside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 4 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 4 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 4 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 3 |
| Offside Footrest insecure |6.2.1a| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Rear Brake locking device missing |3.2.A1e| | 3 |
| Rear parking brake recording little or no effort | 3 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 3 |
| An item not tested |Manual| | 3 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |