| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 16 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Registration plate issues | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Registration plate lamp issues | 3 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Brake pedal cannot be released smoothly |3.1.3d| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Centre Lower Rear mono-shock insecure |2.4.B.4| | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Offside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Stop lamp insecure |1.3.3b| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Lower Rear suspension bush has excessive free play shockabsorber bush |2.4.A2a|i|| | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls inoperative on control 1 (front) (4.3.2 (a) (iii)) | 1 |
| Front Brake cylinder leaking (1.1.16 (b) (i)) | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Nearside Indicator tell tale not functioning |1.5.2| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake cylinder severely corroded |3.2.B1b| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Horn not working |1.7.3a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Footrest missing |6.2.12 |a|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Front Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Plate brake test indicates a sticking brake |3.3.B1a| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear Stop lamp not working front brake leaver (4.3.1 (a) (ii)) | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Stop lamp flickers when tapped lightly by hand |1.3.1d| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Handlebar cracked |2.1.1b| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |