| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 68 |
| Drive chain excessively loose |6.2.1d| | 38 |
| Drive chain worn to excess |6.2.1e| | 35 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 26 |
| Headlamp aim beam image kick up to the offside |1.6| | 26 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 21 |
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 16 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Registration plate issues | 14 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 14 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 14 |
| Rear Wheel spoke excessively loose |4.2.1b| | 13 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 11 |
| Horn not working |1.7.3a| | 11 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 10 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Throttle operating incorrectly |6.2.1f| | 9 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 8 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 8 |
| Rear Drive chain excessively loose |6.2.1d| | 7 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Handlebar deformed |2.1.1b| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 5 |
| Rear Drive chain worn to excess |6.2.1e| | 5 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 5 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Rear Drive chain excessively tight |6.2.1d| | 5 |
| Rear position lamp incorrect colour |1.1.2b| | 4 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Stop lamp emits other than a steady red light |1.3.1b| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear position lamp damaged and function impaired |1.1.1b| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Front Wheel spoke excessively loose |4.2.1b| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Exhaust mounting missing |7.1.1c| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Nearside Drive chain worn to excess |6.2.1e| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Front mudguard insecure |2.3.7| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 2 |
| Front An item not tested |Manual| | 2 |
| Rear Wheel spoke cracked. |4.2.1b| | 2 |
| Seat insecure |6.2.1a| | 2 |
| Motorcycle structure excessively corroded |6.1.1a| | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Handlebar mounting insecure (2.2.1 (a) (i)) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |