| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 133 |
| Horn not working |1.7.3a| | 61 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 42 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 40 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 33 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 32 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 30 |
| Drive chain excessively loose |6.2.1d| | 30 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 25 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 23 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 23 |
| Registration plate issues | 23 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 22 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 21 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 20 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 18 |
| Drive chain worn to excess |6.2.1e| | 17 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 16 |
| Stop lamp remains on when the brake is released |1.3.1e| | 15 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 14 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 13 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 13 |
| Headlamp aim beam image kick up to the offside |1.6| | 13 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 10 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 9 |
| Stop lamp remains on when the brakes are released | 9 |
| Headlamp insecure |1.2.3b| | 9 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 9 |
| Throttle operating incorrectly |6.2.1f| | 9 |
| Steering headbearing has excessive free play |2.2.2| | 9 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 8 |
| Front wheel bearings are excessively rough |2.3.5b| | 8 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 7 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 6 |
| Horn not working |7.7 |a| |ii|| | 6 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Drive chain excessively tight |6.2.1d| | 6 |
| Rear Drive chain excessively loose |6.2.1d| | 6 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Front Brake excessively binding (1.2.1 (f)) | 5 |
| Front Horn not working |1.7.3a| | 4 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 4 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 4 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 4 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 3 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Front Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 3 |
| Front position lamp incorrect colour |1.1.2a| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |