| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 149 |
| Horn not working |1.7.3a| | 66 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 36 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 34 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 28 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 27 |
| Registration plate issues | 26 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 25 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 23 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 20 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 19 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 15 |
| Drive chain excessively loose |6.2.1d| | 14 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 13 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 13 |
| Drive chain worn to excess |6.2.1e| | 12 |
| Handlebar deformed |2.1.1b| | 11 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 10 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 9 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 9 |
| Headlamp insecure |1.2.3b| | 9 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 8 |
| Front Horn not working |1.7.3a| | 8 |
| Horn not working |7.7 |a| |ii|| | 8 |
| Throttle operating incorrectly |6.2.1f| | 7 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 7 |
| Registration plate lamp issues | 7 |
| Front wheel bearings are excessively rough |2.3.5b| | 7 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 5 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 4 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Front Headlamp insecure |1.2.3b| | 4 |
| Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Headlamp aim not tested |1.6| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Horn control defective |1.7.2a| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Nearside Steering lock stop ineffective |2.1.3| | 3 |
| Rear Brake excessively binding |1.2.1 |f|| | 3 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| 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| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |