| Most common failures | No# failures |
|---|
| Drive chain worn to excess |6.2.1e| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Headlamp aim out of alignment | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Horn not working |1.7.3a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Upper Steering lock stop ineffective |2.1.3| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Lower Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Throttle operating incorrectly Throttle accelerates and decelerates on its own. (6.2.7 (a) (i)) | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Nearside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Nearside Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Rear Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Drive chain sprocket so worn it is likely to fail x 2 off |6.1.7 |c| |ii|| | 1 |
| Rear Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Nearside Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Direction indicator obviously incorrectly positioned |4.4.3 |a|| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Offside Front Handlebar mounting clamp bolt loose bolt to yolk bent |2.1.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride rear sprocket |6.2.1h| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |