| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 9 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Registration plate issues | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Horn not working |1.7.3a| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Front Brake cylinder severely corroded |3.2.B1b| | 1 |
| Rear Brake back plate|s| insecure |3.2.A1j| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Brake performance not tested Due to binding brake (1.2.1 (g)) | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Front Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Steering linkage locking device missing |2.1.3 |d|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Nearside Front Upper Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Offside Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Central Front Position lamp not working side light (4.2.1 (a)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Front Upper Indicator tell tale not operating correctly |1.5.2| | 1 |
| Nearside Rear Lower Drive chain excessively loose |6.2.1d| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Direction indicator adversely affected by the operation of another lamp When stop light applied (4.4.3 (b)) | 1 |
| Nearside Handlebar retaining device loose (2.2.1 (b) (i)) | 1 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Rear Suspension arm attachment bracket/mounting insecure (5.3.3 (a) (i)) | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Front wheel bearings have excessive free play (2.3.5b) | 1 |
| Rear Drive chain sprocket worn to excess (6.2.1e) | 1 |
| Drive chain excessively loose (6.2.1d) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Front Brake disc(s) cracked (3.2.A1g) | 1 |
| Throttle operating incorrectly (6.2.1f) | 1 |
| Indicator switch insecure (1.5.4) | 1 |
| Wheel fixing missing (single fixing) (5.2.1 (a) (ii)) | 1 |
| Handlebar deformed (2.1.1b) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Brake pipe union leaking fluid |3.2.B4| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |