| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 19 |
| Rear reflector missing (4.8.2 (a) (ii)) | 16 |
| Registration plate lamp issues | 11 |
| Registration plate issues | 9 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Stop lamp remains on when the brakes are released | 3 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Offside Front Footrest insecure |6.2.12 |a|| | 1 |
| Steering operation restricted in free movement from lock to lock Moved and adjusted cable |2.1.4 |c|| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Chain guard insecure (6.1.7 (i)) | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Offside Front Footrest insecure tightened up (6.2.12 (a)) | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Front Brake lever has inadequate reserve travel adjusted span adjuster |3.1.3b| | 1 |
| Offside Front Footrest insecure (6.2.12 (a)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Stop lamp not working Not operating from brake pedal. |4.3.1 |a| |ii|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 1 |
| Position lamp switch does not operate in accordance with the requirements (4.2.2 (a)) | 1 |
| Front Position lamp lens seriously defective (4.2.1 (b)) | 1 |
| Position lamp switch does not illuminate all position lamps with a single operation (4.2.2 (a)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 1 |
| Position lamp missing (4.2.1 (a)) | 1 |
| Nearside Shock absorber has a serious fluid leak fork seal |5.3.2 |b|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen incorrect pattern |4.1.2 |a|| | 1 |
| Offside Direction indicator not working front and rear |4.4.1 |a| |ii|| | 1 |
| Rear Brake component modification unsafe rear brake pedal snapped |1.1.21 |d| |i|| | 1 |
| Rear Brake component insecure pedal/cylinder assembly loose/bolt missing (1.1.21 (c)) | 1 |
| Rear Direction indicator not working both (4.4.1 (a) (ii)) | 1 |
| Stop lamp not working for rear brake (4.3.1 (a) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Headlamp not working on dipped beam Replaced bulb |4.1.1 |a| |ii|| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Nearside Front Handlebar excessively deformed |2.2.1 |c| |i|| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Nearside Front Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp not working FRONT AND REAR NOT TURNING OFF (4.3.1 (a) (ii)) | 1 |
| Nearside Front Brake disc insecure (1.1.14 (a) (ii)) | 1 |
| Nearside Position lamp not working (4.2.1 (a)) | 1 |
| Upper Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Offside Front Position lamp not working |4.2.1 |a|| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Pillion seat insecure (6.2.6 (a) (ii)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls brake not illuminating when rear brake applied. (4.3.2 (a) (iii)) | 1 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Rear Stop lamp remains on when the brake is released Rear brake pedal sticking |1.3.1e| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Front Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Rear brake disc in such a condition that it is seriously weakened | 1 |
| Central Rear Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |