| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 11 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Registration plate issues | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Nearside Front shock absorber seal failed and leaking oil (2.3.3) | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Drive chain worn to excess (6.2.1e) | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Brake linkage has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Offside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 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 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Rear Brake linkage has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Front Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.5.1) | 1 |
| Rear suspension component excessively corroded. (2.4.A.1a) | 1 |
| Rear suspension movement is excessively stiff (2.4.A.3b) | 1 |
| Rear mono-shock insecure (2.4.B.4) | 1 |
| Drive chain excessively loose (6.2.1d) | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Steering movement excessively notchy with the wheel raised (2.2.1b) | 1 |
| Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Rear Lower Rear shock absorber insecurely mounted not connected to swing arm (2.4.A.3b) | 1 |
| Rear Drive chain sprocket worn to excess (6.2.1e) | 1 |
| Rear suspension movement is excessively stiff swing arm bushes (2.4.A.3b) | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |