| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 33 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 29 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 29 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 21 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 12 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 11 |
| Drive chain worn to excess |6.2.1e| | 11 |
| Registration plate issues | 11 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 10 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Horn not working |1.7.3a| | 9 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 9 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 8 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Offside Rear Direction indicator not working |1.5.1c| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 4 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Offside Rear Direction indicator insecure |1.5.3b| | 4 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Rear Wheel corroded significantly reducing the original strength |4.2.1a| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Offside Steering lock stop ineffective |2.1.3| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Offside Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 2 |
| Nearside Rear Footrest insecure |6.2.1a| | 2 |
| Rear Footrest insecure |6.2.1a| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Indicator switch insecure |1.5.4| | 2 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a)) | 2 |
| Fuel system component leaking (6.1.3 (b) (i)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |