| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 9 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Horn not working |1.7.3a| | 3 |
| Registration plate issues | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Front shock absorber seal failed and leaking oil both front |2.3.3| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride drive chain spring link locking device fitted in incorrect direction |6.2.1h| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Stop lamp not working Not working with front brake control (4.3.1 (a) (ii)) | 1 |
| Offside Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Offside Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Centre Rear Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake pipe union leaking fluid |3.2.B4| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Centre Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Rear Lower Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Headlamp switch insecure |1.2.4| | 1 |
| Front Indicator switch insecure |1.5.4| | 1 |
| Front Horn control defective |1.7.2a| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |