| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 43 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 31 |
| Drive chain excessively loose |6.2.1d| | 21 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 16 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Horn not working |1.7.3a| | 11 |
| Drive chain worn to excess |6.2.1e| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 10 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Registration plate lamp issues | 8 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Rear reflector on motorcycle missing |1.4.1| | 8 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 7 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Registration plate issues | 7 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 6 |
| Nearside Front Direction indicator insecure |1.5.3b| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 6 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 5 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 5 |
| Rear mono-shock pivot seized |2.4.B.4| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Offside Front Direction indicator insecure |1.5.3b| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Front Steering headbearing has excessive free play |2.2.2| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 3 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Offside Handlebar deformed |2.1.1b| | 3 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 3 |
| Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Offside Rear Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Rear Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Handlebar deformed |2.1.1b| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Offside Front Handlebar deformed |2.1.1b| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear suspension component seized |2.4A2a|ii|| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |